I had a great time on my first playthrough. The art looks great, the 5e rules are well implemented, it is all around shaping up to be a great game.
For me, the lack of group interaction was quite immersion-breaking though. The cinematic dialogue animations would be great, except that they bring the lack of group dynamic into such sharp focus.
With very few exceptions, the cinematic dialogue is all one-on-one interactions between the PC and whichever NPC they are talking to. I feel like the game would benefit from dialogue revolving less around the PC. Astarion should be directing his acerbic wit at each of the companions, and at any NPCs the group interacts with. We should see Lae'zel and Shadowheart bickering, or Wyll and Gale making wisecracks back and forth.
Everyone has a tadpole, so when encountering Halsin, or the Hag, or Raphael, or anyone who might present a solution, it feels weird for everyone whose life hangs in the balance to stand around quietly deferring to whatever the PC decides. Everyone present for a conversation should be interjecting their own agenda, opinions, and questions on the topic.
Rather than a metagame icon in the corner letting you know that so-and-so approves or disapproves, it should be shown cinematically with a reaction shot at least, if not dialogue to the effect. Also, anyone not privy to a conversation should not have any approval or disapproval of something they didn't hear you say.
Another good opportunity to inject some group dynamics would be at the end-of-day camp scene. Instead of having each companion standing around separately doing an idle animation, have everyone sit around the campfire. When the player has mediated tensions between companions, they might all be sharing a laugh as Wyll recounts one of his adventures. If the player has instead stoked enmity between them, the companions might be at each other's throats, arguing over whether to track down Halsin, or to focus on finding the Githyanki creche.
Anything to make it seem like a fleshed-out adventuring party, rather than just NPCs with exclamation marks over their heads, waiting for a PC to come along and go through their dialogue trees.
All that said, I will reiterate that it was still a very fun game. I just didn't feel like I was part of a group in the same way that I did when playing Pillars of Eternity or Pathfinder: Kingmaker.