User blog comment:AtlasFlame206/Expectations once the Fairy Tail anime returns/@comment-112.198.82.80-20131006083205/@comment-4829046-20131006083524

Because more often than not, the fillers are terrible. Poorly written, poorly animated and degrade the characters like hell. They make the characters seem weaker and dumber and in some cases give them character development when they never needed it in the first place as the main story has no such thing.

However the ones you mentioned would be nice to see if they are done right, not like the abysmal Kagura Vs. Yukino and Mermaid Heel Vs. Lamia Scale.