Seeing some feedback on Steam, I suggest that the requirements on items be changed from exponential functions, which are hard to control accurately, and be set instead using direct statPerLevel overrides at the different items levels, which can be controlled with precision (ie. different linear functions). Not a big deal, but it'd give you that extra level of control.
Many of these complaints aren't warranted btw -- people have gotten used to easily mowing down level 200 monsters, which is a pretty ridiculous expectation if you're expecting the game to have any challenge at all. But you'd have a lot more control using linear functions at each item level, and be able to tweak things with precision.
To me, the fact that it's still pretty easy to kill monsters 100 levels higher than you rather than being an extreme challenge choice suggests there's quite a bit more changes to make.