I'm going to be lame I guess because I can't be bothered to go into too much detail so FFXI-2 not a straight clone with better graphics, I expect it be an evolution.

Take the best parts of FFXI and build on them, make them better. Take the annoying parts and rework them, then add in some fresh ideas, mix it all together and I would have my perfect MMO which would keep me busy until the next FF MMO.