Okay or fair? Are you asking about aim assist in general or PC players who use a controller to get aim assist they would not otherwise be entitled to? Because from where I'm standing a non-cheating PC player on mnk already has so many advantages over a console player that it's almost laughable that the developer would even consider mixed lobbies. And yet here we are. And now you want to level the PC playing field by making those mixed lobbies even more one-sided in favor of PC? Now is THAT okay or fair?
Get Respawn to stop crossplay and then I don't really care what fix they come up with for PC players using controller, but until then you can't ask the dev to screw over the console base by handing out more unfair advantages to another subgroup of PC players. I know it sounds harsh, but if you want controller aim assist then start using a controller and see if the advantage you gain is worth all the other things you have to give up. I'm pretty sure that unless you're going to ALGS some time soon that the answer is probably "no." As a matter of fact I'm pretty sure that you'd realize quickly that controller aim assist is not the holy grail it's made out to be, by mnk uses or by the clickbait content creators. Most of the unbeatable players people see are, I'd wager, genuinely cheating. Paid cheat subscribers.