"Proving Grounds aren't perfectly evenly balanced for every class and spec, so they shouldn't be used to compare the different classes and specs."
It's funny comparing the amount of people of each class that have completed Endless DPS and getting a clear picture of how imbalanced PGs are.
http://www.wowprogress.com/char_stat...ield.pg_damage
978 mages
963 hunters
830 DKs (both frost and unholy)
740 warlocks
490 monks
448 rogues
407 warriors (both fury and arms)
331 shadow priests
221 retribution paladins
124 shamans (both ele and enh)
70 druids (moonkins and ferals)
While these numbers are skewed, as more people probably could do it with their mains if they tried instead of just going on a DK alt and faceroll it, they still show how damn awful druids and shamans have it. So yeah, Blizzard is completely right here and having PG as a alternative to an ilvl requirement would be really stupid.