Hard to say and it really depends on the person your asking. I hate FFXIII but thought XII easily wiped the floor with it's previous X. I think different is probably the best term, and some will roll with it and some will hop off the train. But also..what's it getting worse than anyway? In my list the games always seem to slide back and forth on which one is better or worse than the title prior.

FF1-Better (Than something)
FF2-Worse
FF3-Better
FF4-Better
FF5-Worse
FF6-Better
FF7-Worse
FF8-Worse
FF9-Better
FF10-Worse
FF11-Uhh hmm wha..?
FF12-Better
FF13-Worse
FF14-Ummm why is an MMO is this series again?