I think the current leveling speed is fine. It's not slow but it's not fast either when you solo leves, for example. When you get an exp party (good luck with that before strongholds), it's appropriate as well. I have all the battle classes at 50 and when friends of mine decide to give XIV a try, I want to play with them as fast as I can because most of the content is at 50 anyway.

I believe leveling should have more variety (Hamlet defense should help with that, I think) but the speed is just right. Now of course if you get a PL, it's an entirely different problem. But I'm fine with that too, if I can help a friend level something so he can play it with me, I'll do it. You can't get PLed to 50 then complain leveling was too fast.