The only real benefit I can see from staying on IoR is to harvest nodes and get your skills up...but now the threshold for harvesting outside the Tier I areas has been decreased, the competition for nodes in the Tier I areas has also decreased . I would suggest stock up on recources from IoR if you can, but after that there is no point in staying there and you might aswell head to Q or FP. Aswell as it being easier to craft (more ingredients available to buy), you can also pick up society tasks and make a few silver as you harvest. You can make 12s for harvesting your tin clusters!
Minky