Sorry SE, but endgame won't work if you don't fix something.

[Sunarie]

In one word: no.

Please explain to me then, how your idea helps to fix skills not canceling automatically when you run forward, the severe delay between when a player acts on their screen and when you see it on your screen, getting hit by -any- aoe you are out of (not just one that instantly kills you), and effects not applying correctly to mobs because the server hasn't seen it yet (silence example from the previous post).

Edited to add: Your "fix" takes care of one symptom of the core problem..and doesn't even fix that all the way. Any fight that has any sort of AOE is still going to have issues (I have been hit when I was hiding behind the rocks for Garuda, and I've seen people die from that AOE when they were behind the rocks). So it really isn't a fix at all, it's just how you would prefer the fights to go so you can hide the issue at hand.