This is so needed. Looking at endgame to this (yes I know there is a huge differential of spells and crap of that sort), 1 spell does say 15% endgame whereas 1-20 the thing does like 40% of your hp allowing you to be killed so much faster. The 1-20 is extremely fast paced which is ok BC if the lack of spells but when we do the arena tourneys it really isn't as fun BC people literally die in the first minute which kills the fun. So Ima this is good BC it will make the fights longer and make them more interesting. BG's too, one proc from a warrior and your team will just die within in moments it seems. The healing is fine BC in pvp your heals are already reduced I'm guessing like 33%? Whenever I'm out of BH I'm healing 1k hits and 1.8k crit on my 19 Rsham, but come Wsg or arena I am healing 600 hits and 1.1-1.2k crits which is as hard as most damage spells aka starfire, starsurge, final rend tick with sader (crit someone for 1.3k with it b4), fero bite, etc. Endgame every healing spec has atleast 1 spell that heals more than all of the damage spells and more so to help counteract it. You don't have to worry about being killed in a Belf racial or rogue kick from 100-0.
That's all I have to say for now but this is only what I see and think.