Non-combat spells don't get much time to shine right now, but fortunately Larian has said they're working on implementing a way for you to cast them during dialogues.
I believe the example they used was the ability to use Detect Thoughts on an NPC that you're talking to, but I assume (or at least I hope) they're also taking other spells into account.
Yeah, they confirmed this barely a couple of days after EA started.
It's coming. In the same way support for dialogue involving more party members is coming as well.
We'll need to wait and see with what sort of implementation, exactly.
