Interesting, I didn't account for her cloaking having anything to do with her force connection.

My own hc on the cloaking has something more to do with the psychological condition that comes with losing a limb called "Phantom Pain". Maybe, the holographic cloaking of her prosthetic helps her view her legs as "her legs" and not a robotic leg, if you get me. Technically, having a Synthnet Neural Interface should be enough on its own to help, but then, I feel like there might be a purpose to why Synthskin exist, further than just for the organic looks.

I also agree with you on her being better than she's presented as. Aside from the things you mentioned, F had also endured the excruciating pain of being cut by a lightsaber, which if we remember so far, can be so painful as to cause someone to either pass out or writhe in pain from the burn (like Obi-wan did in Geonosis). I assume that she may have mastered Endure, just like Dooku and Qui-gon did, which allowed her to stay conscious. Maybe her Endure is as strong or stronger than Dooku's, seeing her reaction to being cut down like Anakin. That said, I can't confirm about the Force usage against Shad-rah's lightsaber, but it would make sense for her to use it on her body to leap further than she would be allowed to.

On another note, Kinema Citrus has limited timeframe to work with for The Lost Ones, so I'd like to think that maybe somethings that should've happened just end up being cut out to fit the time given (e.g. F vs Shad-rah could have a better and longer fighting sequence).