That’s fairly fundamental facet of the basic gameplay design. You have a Primary and Secondary weapon, things with item levels, blessings, and perks, that are supposed to be your general killing tools. Blitzes are there to solve problems your normal tools aren’t suited to.
when that could be said about the other two but i don’t see those getting nerfed
Running Smite as a primary weapon won’t kill much of anything, you need someone else to help. Trying to Brain Burst everything is way too slow and awkward between the casting speed and channeling requirement, it’s there to solve tough targets not kill everything.
Assail is functionally an auto-aiming headshot-seeking multi-body-penetrating autogun with half sized magazine but infinite ammo, meaning recharge speed is the easiest way to tune it down without changing much about the core functionality. Being able to dump 13-14 shards in about 10 seconds (they recharge as you’re shooting) and be back up to full thirteen or fourteen seconds later, and often never needing to shoot all of them for many engagements, basically meant that you could just sit on and left-click spam Assail most of the game and do just fine. With this change, Assail still kills packs of Pox Hounds and Shotgunners in seconds by just left-clicking down the hallway (though you may get 1 or 2 fewer shards before hitting zero when dumping), will still clear out the first wave of a horde effectively, and still can nail those gunners on the gantry above you, it just can’t keep doing it in place of using a stave of an actual gun for most of the game.
I should be able to use what ever psyker power on the list with the right build make it into the main weapon
The Psyker powers are not intended to be your main weapon, and none of the Blitz abilities on other classes can be used as main weapons either. You can max out Assail’s lethality before you hit 30 and Assail doesn’t care about your gear, so keeping that in mind, I don’t think there’s a good case to be made that an undergeared character below max level should be able to turn a Blitz ability into a main weapon capable of matching top tier damage output.
It feels to so slow now my staff does more dmg over all for less perils cost and more speed
Assail should be there for burst damage, close range clearing, and hard to hit targets, but your staff absolutely should be doing more overall damage, that’s how things should feel.