When I was leveling my first class, I was in a FC that rarely had buffs, no one was ever on, and because of being a NA player on an EU server, there was never anyone around for FATEs during the main times I was on. I still consider hitting the level cap to be the quickest I've ever hit the level cap in a game that it wasn't just absurdly easy to level up in......
More so, if you're talking about secondary classes, it's insanely easy to level them now. If you're trying, then even when playing in off hours you can easily get a class from 1-50 in just two or three days. If it's prime time, then probably just a single afternoon if you're really working at it. The grind from 50-60 is a bit longer, but then again it was meant to be about like grinding from 1-50 was originally. More so now though, they've buffed EXP through the roof in runs, so you could probably get those ten levels on a class in just three or four days at the most if you're really trying......
Bottom line is that for once I agree with the majority in this thread. You're whining about nothing, and if that's really enough to drive you to quit playing such a great game, then we don't want you here....