I just think that they don't fit where we're at at this point.
It feels like everyone else is doing these really powerful and flashy moves but I don't feel like we have the same sense of growth.
It's not that they don't look and feel like Martial Arts moves it's that they don't feel like they reflect what are character is at this point and how strong and skilled we're meant to be.
I also don't think that they fit the overall theme of speed either, their animations are actually quite slow.
The animations should reflect MNK's speed imo.
And I think there is an issue when other melees look more athletic in their animations than we do.
Edit: They also don't feel very smooth to me.
Funnily enough I'd actually say that Bootshine feels smoother than True Strike and Snap Punch.
Animations like Tifa in FF7R is what I'd like to see and think would fit more.
https://www.youtube.com/watch?v=FXPyMyyLi2Q&t=20s
They've been solving this on DRG in recent expansions, it's basically just Vorpal Thrust left now that feel old.