I've hit 32 yesterday and got Ravage. (On my newest Druid) Fights do tend to go faster but I can't wait for Pounce. Then HotW... then LotP... then Mangle...
So yeah, the more you level, the easiest leveling will become.
As for Tiger's Fury, I don't wanna create another way on its subject, but it's generally considered a waste of Energy. If you do the maths you'll realize it's mostly true, save for some cases which involve calculating Energy regen ticks and all that. Of course it may be nice while waiting for the real combat skills.