Compared to other “modern” A-RPGs I would not consider D4 to be RNG heavy.
Compared to older A-RPGs, it depends. It is different types of RNG.
Crafting/enhancement RNG instead of drop RNG. Still that is less RNG in practise, since it isnt RNG on whether you will even have the item at all, merely how buffed up it will be.
They could easily get rid of the aspect chance.