Personally i would try to push through. The end of the Dragonsong story is great, and the events that set in motion the SB expansion are pretty intense. The questline at 60 is half as long as the one at 50 was(i think i counted 45 3.x quests compared to 100 2.x quests). Only 1 or 2 trials and 4 or 5 dungeons(plus a few solo duties and some running around). And the dungeons and trials can now be run unsynced if you dont mind giving up a bit of exp and dont want any challenge. One or two level 70 friends can easily bring you through all the dungeons. Not sure what a small party would need to look like for the trials, but they arent too bad if you just run them normally through DF.