The gameplay of Solasta is exactly what I've been looking for in a game for years. The estimated playtime of 50 hours that kanisatha cited worries me though. I want something I can get lost in for months. Being that they're a first time developer, it might be healthy to temper my excitement. That said, I'll be playing it day one. Hope it does really well so they have funds to make bigger games. Should do - It's a massive untapped market. The next best option is Temple of Elemental Evil, which is a 16 year old game with truly painful jank, only slightly mitigated by community patches.
With Swen shying away from core rules in interviews, I'm less excited about BG3 than I was when it was announced. Solasta devs aren't shying away from that. I'd be lying if I said I didn't badly want a BG sequel. But I've been dying for a pen and paper experience in video game format. Solasta is doing that. Mechanically, I see them playing very differently.