What I loved about KOTC was that there were braziers all around the game, where you could bull-rush enemies, and then pin them while grappling(wall of fire spell worked wonders too).
What I propose, is that there be similar things in KOTC2 too, but ones that are more varied. For example, spikes, pit-traps, slime, spinning blades, irritating fog, and all kinds of strange and cool things. Would make bull-rush much more useful. Sure, you can mimic most of these things with spells, but if they're a natural part of the map, then perhaps the enemies will also use them to harass players with, as they did in the first game.