All this reads as (from the people complaining) Dark Eldar don't work the exact way they used to and I'm resistant to change; they must suck.
Same thing, as far as I'm concerned, that happened when Tyranids got updated for 5th. People wanted to use the same army list as before and it didn't work anymore so they must suck.
By the way, I love the "AP3=useless" priceless. Apparently if it can't cut the armor of a very small selection of units (terminators, some characters, sanguinary guard, etc.) it must be useless.
Las cannons are useless because they can only kill 1 Ork Boy at a time.