This game is basically only casual friendly until you hit the level cap.
Then it shifts focus as you wish to either compeete in PvP or do the PvE raid dungeons which you'll never get to do in 2 hours. It usually takes just 1 getting people together even with a defined meeting time
Professions are fast to level compared to all other MMOGs I've played, however as normal - the crafted items are less usefull then the drops gotten from PvP or PvE (well they were when I played, dunno if they have beefed them up).
So with a 2hour timeframe, you can get a couple of months of fun out of this game for sure - but once you get neare to the level cap with your main/favorite character, you'll start to feel the limitations of time.
That was what made me quit the game.