I don't think the sidequests around the towns are repeatable, however do remember that there are 3 different cities, each with small towns (like Hyrstmill, Aleport, Golden Bazaar etc), along with the sidequests around the camps as seen in the videos, not to mention the few small towns in Coerthas if they keep those as well.. So there are plenty of sidequests for EXP I feel, if not it wouldn't be hard to implement a few more I am sure..

Plus as mentioned there are other forms of EXP, but the biggest note I will make are Dungeons.. From my understanding there are going to be dungeons for every 10 or so levels (a couple that have been confirmed in Black Shroud), along with the presumption that there are a few in the other zones (La'Nosca / Thanalan).. I am pretty certain that there will be an ample number of ways to EXP, even just levelling in dungeons alone. Mix that with leve's, sidequests, FATE.. I think the number of options alone is a huge improvement.