Wife and I just started playing WoW retail again after years away from the game. Once we reached 34 all the zones became gray and offered no chance of leveling there.
We wanted to hit RFK for some dungeon fun but all the mobs were way low level. What gives? Why are all the zones now grayed out? What is the leveling progression now for retail WoW? TIA!
You might want to post here 
for retali questions.
If you use Chromie time to play classic , the zones scale to 60 I think. I could be wrong because at level 30 I usually switch to the Dark Portal zones as the gear and crafted items in Outlands scale better to 30 level. More often than not i cant find a classic pug and end up taking a higher level dungeon from the group finder , however.