Yeah, if the fps and wifi are issues then they really need to find a workaround for this since you don't hear of other games having this problem. For instance, I play monster hunter rise on switch with players from other systems and it works fine, and I have no delays syncing with other players, which in that game you have monsters in the advanced stages that have special moves that can one shot you with even a delay of a millisecond.
I think if they are going to have apex on the switch they should work on syncing it up with the other systems or else sunset the game the way they did the mobile version. Maybe make it a separate game just for switch players and not allow cross play if they can't.
Plus the game ran great prior to season 20 so the potential is there. With season 20 you can see the graphics were greatly downgraded (almost pixilated in places) and the movement was slowed down greatly. I hope they fix the switch version back to what it once was.