Earlier quoted context omitted.
Yeah the Divinity: Original Sin 2 combat system had the huge emphasis on elemental effects and surfaces and interactions which I found a lot more fun than the traditional RPG systems which feel more like solving a math equation. So far there has been a lot less of that in BG3 which is disappointing but maybe I just need to level up my spellcasters more. (I hate the DnD spell preparation system but that's another matt…
The element interaction from Divinity: Original Sin 2 are still there. Grease works and will catch fire, you can get ice spike and it'll create an ice surface where enemies and players will slip, then turn into a puddle next turn. They will also slip on a sufficiently large puddle of blood. The intro ship has vats of mysterious liquid that will catch fire.
Making it flammable sounds very powerful.