I would like to see Sabin's Blitz from FF6 added for MNK in some way as a new mechanic. Of course, before anything else a Chakra rework has to come first, but it still needs another mechanic on top of that to interact with it, it can't be just Chakra alone even if it functions well.

I've read a lot of suggestions as for how a Blitz mechanic could work. One of them is by changing Perfect Balance to be the catalyst for it (and in doing so it'd make PB far more interesting as a burst tool than it currently is) or another that essentially makes it a 4th step combo, both of them utilizing MNK's combo forms to act as the "combination inputs" if you will - which I feel would be a clever way to use its forms as right now they're basically only being used as an excuse for Leaden Bootshine to exist.

Blitz attacks themselves could open up a new way to interact with MNK's weaponskills and not just be boring big strong attacks. Just as an example, a specific combination involving double True Strike could reward you with a Blitz that makes the next Demolish add its full potency into its initial hit ala BLM's Thundercloud. (Adjust the potency accordingly, of course) Put the "Demolish" back into Demolish and make Bootshine less polarizing.