Picard was great use of the Borg.
The Borg didn't matter for Picard until he learned that Soji was on the cube at the end of episode 5 and he was off the cube at the end of episode 6. It didn't matter that much for Picard's story. The Borg cube was just a set piece that was dangled in front of the audience.
His return to the cube and reunion with Hugh was amazing.
One of the many problems I have with NuTrek are the unearned emotional moments and overemotional reactions. The reunion with Hugh was one of those moments.
When Picard and Hugh depart at the end of "Descent Part 2", they had one scene together, they don't shake hands, they just say "good luck and goodbye".
The first thing they do in PIC is to hug as if they are best friends. Picard and Hugh were not friends. Geordi and Hugh were friends.
29 years have passed between TNGS07E01 and STPS01E06. They even make a point that Picard and Hugh never met in that time, even after Hugh became a Federation citizen.
People who find this scene so fantastic misremember the kind of relationship these characters have and the writers of STP exploit this.
Picard comes to the realisation the Borg are not monsters, but victims like he himself was.
For me this was frustrating and a sign of lazy writing.
The Borg are still monsters. Borg drones that are separated from the collective are not monsters but victims that can be rehabilitated.
WOW! What a great revelation!
Did you watch TNG? That is the story of "I Borg"! Picard knows that because he learned that in that episode. What did Picard learn that he didn't know in TNG? Only the scale? This is such a clumsily written character flaw.
The writers made him regress so that they can write a story where he goes through the same character development again.
The development of ex-Borg was also a theme in many VOY episodes. Picard knows about Seven (and presumably about other ex-Borg from Voyager), why he does view ex-Borg as monsters is incomprehensible.
Do you know what would have been an interesting story? How different A/B Quadrant societies react to ex-Borg.