FFXI took tons of space if that is what you mean by Game hog, They was also many MMOs planned for the 360 but MS isn't making easy for devs because they way they run Live. Maybe Square can talk sense into them.(hopefully)it could be good both of them.
Never say never. FFXIII, Takken, VF5, DMC4, NGS2, Bioshock, etc was all said never too be muti yet they are and Square done they trying to work something out with MS. Doesn't matter though PC version will be the best.
And if doesn't come the 360 not saying it will because with MS ego it may not. It's MS that is losing out. Its not Square didn't try, lol but hopefully it does because with FFXIV on PS3, PC and 360 it would be great for Square and FFXIV.