What? Mnk is in a pretty good spot. It's dps is really good and it brings utility, albeit not quite as good as Ninja. Go look at the highest dps of any content and you'll see quite a few mnks among the BLM and SAM(which have no utility like brotherhood). If you're complaining about losing GL then you're honestly just playing the class wrong.

But tackles and tornado kick are actual garbage that need reworking.