No more Battlefield for you.

also no second grenade slot.

grenades are useless on an assault suit.
you should be using your main weapon.

assaults arent meant to be versatile and have lots of stuff.
you have your tank, you have your gun, you kill lots of things.

give grenade slots to basic suits since they dont have any specialization.
assaults are the hac's of dust.
good tank and damage and godly killing machines among the medium and light suits. but apart from that they cant do anything. poor hacking, no equipment, no sidearm, no grenades, you rely on support and you focus on killing killing and them some more killing.

I don't think it should be EMP based. That's what the flux is. Our suit's optics have already been proven to resist the effects of EMP, somehow.

It should be light based. A ******* lot of light. Like a stupid amount of light.
So much light, in fact, that it burns the sensors out of any suit that happens to be looking at it. Just burns them right out. The target will just get hit with an error screen that says something along the lines of "visual feed lost" or "optical sensors disabled".

Maybe a 15m area of effect, with the length of blindness tapering off from the center. 3 seconds of blindness at the epicenter, and if you happen to be at the 15m point, you'll only get like 0.15 seconds of it.

Of course, the built in nanites that every suit now has will prioritize fixing the optics, which would explain how the optics are being fixed.

And of course, there would be the issue of damage. I think they should do damage. Laser Profile damage.
Not much, just enough to scare someone or destroy some equipment. Like 100-150 damage.
Not even a huge area of effect for the damage either. Like 2-3m.
The damage would be an overall secondary thing. Something to allow limited anti equipment capabilities, or soften up a target a little bit while they are blind.