I think there's a lot of course correction for Kathryn Janeway in this episode and I wonder if it's Mulgrew's influence as I have a much more consistent grasp of her character than I do from Voyager (and I just rewatched the series). To be blunt, Hologram Janeway is SCARED of the Borg and pretty much tells the crew to run away from them. It's a vulnerability that adds to the character and fits much-better with what we know of the Borg while regular Janeway never did run from the Borg but more or less ran at them.
Different set of circumstances.
During her time in the DQ, Janeway was a Captian and had an experienced/trained SF crew at her disposal.
Also, during the first encounter with the Collective, Species 8472 were involved which gave her an edge.
Additionally, Janeway was noted by both Chakotay and Tuvok to have a knack for feeling responsible for dragging the entire crew along with her because of her decision to destroy the Array.
She was also semi-desperate in trying to find solutions to bring the ship back and crew home (faster)... that necessitated her to take some unprecedented (but calculated) risks.
Also, even real/live action Janeway was noted to be afraid of the Borg... but as a captain, she needed to project confidence to the rest of the crew.
I don't particularly remember Janeway flying at the Borg and not being afraid of them. The only time I could really say this may have happened was perhaps in Unimatrix Zero, but again, she had the Borg resistance there in the background... and while flying at a tactical cube may have been suicidal, VOY was heavily upgraded by that time and had 7 on board to help too.
As a hologram, she's an advisor (not a Captain). And it would be reasonable for her to show a side of herself to these kids that she didn't to her own crew (or at least not all of them - I suspect Tuvok and Chakotay were privy to her real side more than anyone because she was closest to them).
Part of what I like about this episode is the Borg are also treated as far less personal in their evil and no less malevolent for it. The Borg aren't doing this because they get pleasure from evil like the Borg Queen or sadistically tormenting Seven or Doctor Jurati. No, they're an assembly line and the rest of the galaxy is parts. It's like my best friend, Michael, has the same opinion on Davros for the Daleks.
While I hadn't watched Doctor who... I have to say the Borg do work better without the Queen. The original premise of the Borg in TNG was that they don't have a single leader (who is prone to make mistakes - its the collective mind of all of them) - which also made them much more sinister/dangerous.
Also the Borg aren't 'evil' per say. 'Evil' is also such an antiquated term that doesn't really do anything justice - its heavily biased description as well.
Like any other species, the Borg follow certain 'directives'... but the key difference is that they are usually more advanced than most species in the galaxy so that when they recognize something of use, they just take it and make it part of themselves. The don't concern themselves with cultural niceties because they find them useless obstructions (which to be fair, wouldn't be a wrong description - because people tend to go through various jumps and hoops, run around and seemingly avoid getting to the point - to me that's also ridiculously bad aspect of communicating with other people because I prefer directness).
I didn't particularly mind the queen, but she did seem more of an 'individual' which didn't contrast that well with the premise of what the Borg were.
If you recall, even during VOY's first encounter with them (during 8472 invasion), the Queen was not there to discuss things with them... but it also stands to reason the Queen may have filed that as an anomalous encounter. It wasn't until 7 got liberated from the Borg and then the Borg tried to get their hands on her again in Dark Frontier that the Queen started to take a more prominent role in the Collective's interaction with VOY - plus, Janeway dealt a severe blow to the Queen by getting into her chamber, taking 7 back, and then managing to fly away in the Delta Flyer, only for VOY to blow up the Queen's Diamond while still in the TW conduit (along with the Queen herself) -this probably grabbed her attention (though I also think Janeway had it a bit too easy while in the Queen's chambers in Dark Frontier).
The Daleks are infinitely better and more terrifying without Davros because the Daleks are terrifying due to their lack of individuality and indifference. This episode nicely conveyed the Borg are dangerous because we're ants to them.
Honestly, I never thought the UFP was 'ants' to the Collective. In fairness, if UFP actually USED their technology in a more sensible fashion, they'd probably be able to resist against the Borg much more effectively and keep them at bay.
Plus, SF DID technically create deployable armor and transphasic torpedoes against the Borg which seemingly kept them at bay in an alternate timeline - or at least Janeway and her crew have.
The UFP just needed a bit of time to get things right in their dealings with the Borg - it was actually a good thing the UFP was so far away from the DQ... plus with who knows how many other species having issues with the Borg, and possibly at the time more interesting than UFP, its possible the Collective just figured it would send 1 ship at a time to the AQ to test UFP occasionally (which also gave it time to adapt).
Oh and a reminder that our heroes straight up killed two Borg in this episode.
Yes... but that's not so unusual. In the end, even with the Borg moving so slowly, they were coming at the kids from all sides and overwhelmed them after adapting to phasers extremely fast (which should have had rotating frequencies fully automated by now).
Also, apparently are indirectly responsible for the Junior Lieutenant's death.
If you are referring to the Denobulan from the relay station, he got away in the escape pod.