User blog comment:Miskos3/Fairy Tail Anime Relaunching!/@comment-84.13.41.227-20130711122321/@comment-2125188-20130711141310

like i said, there is a budget. there is not much they can do. fairy tail is a long running series over 100 episodes, so there budget is smaller in comparison.

As for those other series, some series are easier to animate then others and some production companies can find good animators for cheaper then others.

At the end of the day they can only use what they've got to work with