I hoped they would be smart enough to switch from hexagons to octagons, but no, they started degrading and ended up with squares.
They could have just updated the engine, the graphics, and added some new units and relics, but no, they had to come up with something "new"! IMHO, it's idiocy.
Generally, I lean more towards Heroes 4, meaning that you should be able to move characters (by the way). Without a doubt, the field needs to be increased, preferably at least twofold, while the starting distance between armies can remain the same (8-10). Armies should be able to move in all directions from the very start and not just three; then it would be a triumph of tactics. But now, in my humble opinion, it's a triumph of the developers' senile dementia, obsessed with demiurges.
They're probably having a creative crisis right now...