I'm obviously in the minority, because I liked
the Temporal Cold War stuff. I was bitterly disappointed how it was "wrapped up" in Storm Front. A missed opportunity.
That said, most of the episodes in Season 1 and 2 were boring
. And it didn't feel like a true prequel, except for the occasional "fear" of transporters.
It was almost like the writers were like: yeah yeah, prequel prequel, but after 6 episodes that phaser-cannon better be online, because we wanna do Voyager again! (now with Vulcans!!!).
Season 3 was very
good, and while season 4 had lots of cool TOS-nods, the multi-episode mini-arcs resulted in sometimes slow-moving stories in my opinion.