I've noticed that I really like the 2.5D aesthetic during combat for turn based RPGs. Think of the combat environment in Child of Light, Darkest Dungeon 2. (think 3D models set on a 2D (watercolour-esque?) background. I think this design choice is better than going full on 3D.
[LINK] - child of light
[LINK]&t=169s - darket dungeon