1. Dont have the game move stuff around in inventories. I have my potions divided between my characters to avoid encumbrance. Every time I interact with a merchant it dumps all the potions back into one inventory.
I asked Kris about this one and he says he can't do anything about it...
You have to know the whole history of how this came to pass to understand, but to make it short: divide different potion types (e.g. DK has all mana, hero has all health) because the potions are in a stack anyway if you wanna drink em (i.e. even if your DK does not have health potions, he can drink one if hero has one).
3. Dont have the bottom levels of battlefields empty - if there wont be a quest completing npc down there put something down there to make it worth while.
Sorry, this is by design <img src="/ubbthreads/images/graemlins/smile.gif" alt="" /> (Besides, you did gain experience in the upper levels, and with a bit of luck, you found cool stuff there already.)
5: I think the game is a bit too easy already...