Last time I played was back when 5.0 released, is it worth the time checking it out now? How about population and is it possible to catch up right now?
catching up wont be a problem at all and especially on the paymentserver it is even easier as the only thing that matters here is gear, it can be done in a few days for an average player or even faster for an enthusiast
also, today was a gearreset so orange gear miniseason starts now. this means you will be more or less exactly on par with everyone else as soon as you reach max level