Cazador would have been more involved with the whole plot , if the upper city had made it into the game, there were datamined voicelines with Cazador.
As it is, Astarion has no ties whatsoever to the main plot. Wyll should have, giving his background, but hasn't enough.
I would have love a mention of Duke Ravengard in the epilogue, that the city is more stable, when he is alive or Will became his successor.
The Sharrans are a bit of a special case imo. I mean their endgoal is destruction of everything that exists and they operate from the shadows, but depending on decisions, they can at least become allies in the final battle, if you play an evil character. I don't think, that is possible with Cazador?


"We are all stories in the end. Just make it a good one."

Doctor Who