This gear is going to eventually affect balance in pve and wvw. Roughly 3 additional critical damage from each piece of ascended gear is going to be significant. Some builds already put out some extremely high burst. I don't think those builds need 25 more critical damage, and I'm not confident in Anet's ability to balance ever increasing stat growth. Not all stats have been created equal, and it will only get worse and more obvious as better gear gets added.
Didn't people whine about exotics being 13(?) % better than Rare, and yet when all was said and done the actual difference to the character was only 4%
I've lost count of all the times 4% prevented defeat. 200 hp is all my ele needs to last that extra half second to activate water attunement, heal, remove conditions, hit mist form, dodge that last fatal blow, ride the lightning away or whatever. The same thing applies to ascended gear.