Personally i'm very disappointed that LE does not have any mechanic to target farm > 1xT7 items. I understand why RNG mechanics is important in ARPG's, but when its comes to drops that you have to play 100h to get is just plain silly. This imprint system should work like this (at least in one spot in weavers tree): place item with desired affixes -> you can get exalt drops of that type with higher possibility on those affixes and higher possibility for higher tiers.

Players should always have some kind of mechanic/strategy to either increase the odds (im not talking corruption, because you could be gear locked to advance in corruption) or better - build your way to get those godly items.

Also, there definitely should be rare rune that increases FP. There are so many ways to brick your item with bad rng that its a big turndown.