Why does vMA and vVH have to be harder for everyone, so PvP can be better for some?
People who can easily do the arenas currently on live will also be able to do them after the patch. It just may take a bit longer due to dps and mitigation nerfs. But players who currently struggle to clear them or barely make it, will unfortunately be left out from this content or have to do normal.
By "master" you mean go through mental calculus to figure out a way to get as close as possible to the something we have today, albeit a watered down nerfed version.
Assuming you attacked in the last 2 sec, does a dot count?
People who can easily do the arenas currently on live will also be able to do them after the patch. It just may take a bit longer due to dps and mitigation nerfs. But players who currently struggle to clear them or barely make it, will unfortunately be left out from this content or have to do normal.