As it looks they are apparently mess up some (significant) parts of it.
Time spend on the game does not equal or guarantee that it is gonna be great.
Gameplay looks great and most people like the graphics/art/visuals, but in regards to loot, it looks like they gonna mess it up. Loot is going to be better than in D3 by the simple fact that there will not be any of these ridiculously inflated damage and defense multipliers, however, that alone is not enough.
I wrote a whole thread about the issues with D4’s itemization…
and also posted about it in the last quarterly update thread:
Furthermore there are issues with D4’s skill system, because as it looks it is going to be a worse version of D3’s rune system, just without the runes, since in the end you will be able to max out every single skill. Yes, there is skill progression, which is good, but again, it is not enough when in te end you can have maxed out everything.
Runewords is one of the things they imo did not get right in D4.
RW’s in D4 are very different than in D2.
In D2, runewords were basically craftable unique items that you could choose the base item for, while in D4, they are more like D3-like gems that have a condition that is required to activate a bonus (e.g. gain x life when you get stunned, etc).
I personally was not satisfied with that.