WAR got some massive changed in 2.X (can't remember exactly, but it was early on) and it made the job go from trash to really good. Now, the main reason they went to this length was because WAR just couldn't survive in content, so it was needed (people were taking 2 PLD as it was more effective).

However, because MNK DPS is fine (which it is) and it isn't hindering anyone from clearing content, the DEVs probably don't see it as an issue, at least not in the same way as the massive WAR changes, which is a problem.

The other side is, other Jobs got QoL changes which made them play slightly differently, but it sorted out some issues and made the jobs more enjoyable, which is exactly what we, as monk users, want. Just some changes to abilities to make the job fun to play again and not the mess of contradictions we have now.