You are not alone in your hatred of the linked brakes. Kawasaki should never have let this bike go out the door with the brakes as is. Worst brakes I have ever experienced.
You could unlink them I believe.
I too can't stand them. I've found if you hold the kact button in for a few seconds it puts the in less than full link mode and it's a little better, but I still feel the brakes grab too hard when I'm getting ready to stop.
As far as the bike height issues goes I'm looking at possibly getting a new seat. Just haven't figured out which. I've seen the sargent's, corbin's and the Lamm, but they're all expensive. I could buy crash guards for the price of a seat and then if the bike falls over, I won't be as worried.
I have also looked into getting platform shoes. lol I've tried the height increasing insoles and they work but my boots are too tight with them in. I might try getting some cheap bigger boots to try out and see how well it all works out.
Soo much farkle to do, not enough $$.