I agree with you with this! That’s why in this topic Crafting Impressions and Feedback I suggest to the original poster something to change the way we get LP for our Uniques, I think would be the best decision to get a non-equipment material that adds randomly LP to a Unique or just all Uniques should drop with LP 1 to 4 (but I personally like the first one). That way you don’t need endless grind to get the Unique you want AND with LP. So a bit less of RNG on this part.
But apart from this, I don’t like at all the idea of the higher affixes have more priority when transform to a Unique to a Legendary. I know sometimes the RNG system feels unfair, but If you can get your BiS items with relative easy… The game ends for the majority of people because lost the interest of keep hunting (and that is this, a loot aRPG) and only a minority will enjoy it. I think the idea behind this is always to target the majority of the public. I don’t know if I explain well what I’m saying. But the point is: Not too deterministic but not too much RNG, balance is the answer…