I just started playing a week ago, i for one enjoy every minute i get on. The ques for dungeons vary depending on if your dps heals or tank. Im currently playing a rogue aiming to unlock ninja. So my que times are roughly 25-35 mins for a dungeon in the duty finder. IF you go healer or tank your looking at almost instant ques.

For gameplay wise I dont feel like im left behind i always see other players running around regardless of what zone im in, im usually in a low level zone since im only level 26. I hope this was helpful, happy gaming everyone.