While I'd like to think they could add in some fixes specifically around AOE avoidance, even though they do implement a server-state architecture, there are so many other areas that cause problems because of this. I have a bad feeling that this is going to cause ARR to never really break out of the niche market.

The server-state implementation is why sometimes you heal someone, but they die anyway, or why benediction goes off and on CD, but they still die, etc. You don't know they've already taken that final blow, so you cast send the command to the server. On the server that target died 300+ms ago, so the spell has no effect.