here's a quick review.
1. The story
the usual hero gets involved in planetary-sized plots. Move along
2. the battle system
extremely good. The gambit system is very clever, and basically allow you to customize the other three members of the party so that they will play like you would - with one exception: black/offensive magic (everything but white actually). Either I'm still lacking the proper gambit, or I'm missing something, but I find myself not using black magic at all in the gambits, because MP are scarce, ether are scarcier, and thus I do not want to run out of them. I guess it's a flaw on my part, but currently I have guys doing physical attacks backed up by guys casting cure and giving potions when HPs are low. Hey actually I just thought of a gambit I could use to cast black magic - gotta try that
3. The license system
this is quite good. The only trouble is that you have to constantly switch between your license board and shop inventories to see what you can buy next - both the license and the item, and this is awkward because you basically have to exit the shop, open the license board, check, exit the license board, enter the shop, try to find the item...
But other than that it works fine. License points are not that hard to get (just slow, and not very slow, so...) so eventually I plan to get every license for every character. I like the way some characters are adventurers on the license board, going broadly when no licenses have ever been bought before, and allowing the other characters to benefit from that knowledge and beeline for that specific license.
4. the world map
Skadistic says it's fragmented. That might be true at the beginning, but it gets freakin'HUGE where I'm at currently (right before the tomb of King watchamacallit.) I guess Square had to compromize between area size and loading time, and they did a good job. Monsters roam freely and it's easy to avoid them if you must - like when you only have one guy left standing and have to exit the Bhurjuba mines
Overall my feeling so far is that it's one of the best additions to the FF series - on par with 7 and 10.