Rune slots are now limited to one slot per item
This is a bad change and I have no idea why it was pushed live...
There are many pieces of equipment (higher level uniques) where the only "good" thing about them is the fact that they have 2 or 3 slots.
The only reason to use a 2h staff in Act 2/3 is because they have more rune slots. Now they're simply worthless compared to dual wands or 1h+shield due to all the extra bonuses you get from having the item in the off-hand.
2-handed weapons should, at very least, be able to get double the amount of slots of a 1-handed weapon. And staffs should get more than that, since they're bad in melee.
