Long time lurker in the forums following the Dark Eldar from 5th edition. Overall I like 8th edition, but I feel like there was a big missed opportunity with the Hellion's stunclaw and the Reaver's Cluster caltrops. Back in 5th edition they had such interesting rules attached to really mess with opponents, now they're reduced to somewhat mediocre mortal wound generators.
I know this is far-fetched looking at GW's track record with the Dark Eldar, but I wish they had more interesting rules attached.
Stunclaw(shooting) : 18" Assault 1 S* AP* D* : This weapon my target a <Character> even if it is not the closest unit. On a successful Hit roll, Roll-Off, if the enemy player does not win the roll-off you may pull the target D6" towards the Helliarch. The target suffers a mortal wound if successfully pulled.
Cluster caltrops(shooting) : 18" AssaultD6 S4 AP-1 D1: This weapon automatically hits its target. For each model removed by Cluster caltrops, that unit's movement, advance, and charge ranges are reduced by that amount.
Who knows, maybe GW will surprise us with our Codex someday???