User blog comment:FairyRaven/Fairy Tail Chapter 423: Do It All for Love, Review and Commentary/@comment-24744891-20150309121830/@comment-7418318-20150309180017

At the very least Natsu could have been made to use a second stronger attack and something other than his bread-and-butter roar that he uses against anything hostile including small-fry.

Also consider that Bluenote had 8 years to train and try to catch up with or overtake Gildarts since we last saw him. Not being able to one-hit KO such a mage is no sign of weakness... not by a very, very long shot.

Also how can Natsu still grow if he's already so extremely overpowered? Any enemy that could be a challenge for Natsu would totally annihilate Lucy and Wendy so now Hiro Mashima pretty much HAS to split the girls up from Natsu or let Natsu be the be-all-end-all of all fights from now on. Neither one is a very appealing notion.

I mean just look at it. Wendy was totally helpless against Bluenote and Natsu just brushed him aside like an insect without even trying hard. How can Natsu and Wendy (and by extension also Lucy, since I doubt she's anywhere near his league, even though we don't know for sure) fight together with Natsu if there's such a MASSIVE power-gap between them?