If you've seen the latest Instagram stories, yes, yes they have. Holy hell that bike is amazing.
Gregor, the likely reason that the pegs use the stock hardware is that Ti galls really badly - make sure you keep those pins lubed!
Radial master cylinders are a pain in the **** to bleed on a good day. Have you tried reverse bleeding? Big syringe full of fluid on the caliper bleeder, crack the bleeder at the master and push fluid through backwards?
Now that you've got some pressure you may be able to pump the pistons out a...
I'd point the finger on the swingarm failure purely at bottoming it out hard. The stock casting would likely have failed in the same way if it were bottomed out that hard too (although, having said that, most of the photos of failed GS swingarms have let go at the back end of the arm).