While I enjoy the current ability to move around in as tiny intervals as desired, this sometimes causes problems when I try to maneuver around an enemy - the PC takes just a single step too far and gets bonked on the head by an ogre.
I think having a grid - at least during combat - would offer significant help in AI pathfinding and probably several UI aspects, like aiming AoE.
Another problem I found is how annoying it is to properly look through a battlefield - the camera is locked on the "current" elevation and it's a nightmare to try and inspect something - or ever give a move command! - atop a cliff, even with tactical mode. (Is that what it's called? I'm talking about the "O" view mode.)
I think creating actual layers on the map that the player can freely navigate (such as by pressing +/- or even simply scrolling the mouse wheel) would be a significant improvement instead of being forced to move the camera along the path that the characters would need to walk to get there.
A secondary thing this would solve would be some aiming problems with AoE spells:
I wanted to cast Shatter, however, the enemies were on the edge of a cliff. I wanted to aim the spell behind them - above the cliff - because one of my PCs was rather close to them and would get caught in the spell if it was placed "on land". I couldn't do it because the spell cannot be cast "in the air" - my only options were to either include my character in the AoE or be unable to aim the spell at all. If there was a "floor" on that level of height (the "battlefield layer" as I keep calling it) that could be used as a "point" to cast the spell on, I wouldn't have had to KO my character.
A third benefit I realized while typing this - it could be used to create the "base" for implementing flight (at this point, the only flying creature I encountered is the imp - both as enemies and as a familiar - and from that sample size I don't see any "flying" to exist within the game).
