I miss my R1
Fade at that pace is surprising, but of course possible. A few suggestions (depending on your level of $$ and comfort), this is coming from a 15+ R1 w/ 10+ years of track at the pointy end of amateur pace.
1.) Consider letting a more experienced rider you trust take it for a few laps. This is the fastest way to pinpoint the issues, experience is better than guessing. Even just rolling around in the pits a more experienced rider can quickly spot issues.
2.) IMO the stock calipers themselves are actually quite good, esp. for at this pace. I wouldn't bother spending the money upgrading them.
3.) I am not a fan of ABS on the track, for me it's a single HEL SS line with a T from a Galespeed m/c to the front calipers. The feel is really good. Bite isn't as strong as say an HP4, but I can't say I've ever felt heavier brakes are required. Not crazy bite, a nice amount, but good feel.
4.) EBC HH are ok, but or track use, Ferodo XRAC, Vesrah, SBS, etc. type pads are more $$ but work better IMO
5.) Motul RBF 660 fluid. This would be where I start, super cheap fix (relative to the other options), I would not stray from this, and never use DOT 5.1 fluid.
6.) How soft is the suspension? You may just need a little firmer setup for the track.
7.) The ABS module is required (or things do get disabled), but you only need the electronics portion. You can actually cut the 4 bolts on the module, replace it with a plastic (not metal!) plate from any random plastic container to save the weight. I think the ABS eliminator is too expensive for what it is, this fix is free. Of course your ABS light will be on, but personally I don't care.
To point 5, why would you say never use DOT 5.1? Its got a higher boiling point, so where's the downside?