Im not sure if this has been brought up but its a pretty big bug. I was playing splitscreen with my buddy and i was the guest, i could literally see any invisible assasin no matter how far away they were, i could see the radius of every bomb, airstrike and trap. If this doesnt call for an update i dont know what does.
If splitscreen wasn't so glitchy, laggy, unplayable for the splitscreeners I'd say you're right. As it is I'd say if you're playing splitscreen you need every bit of help you can get...
The worst part is only really when you die, i honestly think it would be cheap as **** if you had 2 skilled players running splitscreen, without dieing theres a normal amount of lag, i just think its dirty how you can see everything.
now that i actually read your entire post i remember a time on ammo mule where i was on my opponents bot lane and a sniper was on the other lane and he headshoted me with one shot while i was invisible, i was shocked and i thought about it till i went to bed. Once i woke up i completely forgot about till now. Cool story bro