Imo the only problem if you just hit level 50 and wanna do the easy dungeons like WP and AK is if you are a tank.
I had huge problems holding aggro when my 2nd character reached level 50. Luckily my fc crafter made me some ilvl 90 gear, but everyones not that lucky.
My third character is a warrior and soon level 35, when I reach level 50 with that one I'm gonna have the same problems I reckon.
Other than that I don't really see a problem for new players