True, but AP2 can be very valuable. If you find yourself playing a cold void & poisoned air mission, the difference between 2+ and 3+ saves is massive, so people tend to default to terminator armour - especially an attacker, who has a compulsory elites choice!
it only takes a small plasma-armed unit to render a passage suicide to advance down.
At the same time, a tactical support squad may be more sensible; reaction fire is very powerful but you still can't use blast weapons; melta or plasma guns on the other hand can lay down a lethal curtain of fire.
HQ-
Legion Champion, with Legatine Axe, artificer armour, melta bombs and refractor field - 130
Primus Medicae, in Cataphractii Armour, with chainfist and combi-melta - 137
Troops-
Legion Tactical Squad, with extra CCW, Sergeant with artificer armour and power sword - 200
Legion Tactical Support Squad, with 5x Volkite Chargers - 125
Elites-
Contemptor Dreadnought with Kheres Assault Cannon - 190
Legion Terminator Squad in Cataphractii armour, 4x power fists, heavy flamer - 215
Total - 997
I'll be honest, it's a pretty good list. The only thing I'd suggest, if you can make the points, is swapping out the tactical squad for breachers - breachers are tailor-made for zone mortalis games.