Tracker is an ideal fake claim, for the reasons you've mentioned. It's validity is further compromised by the fact that he took so long to claim, and that when he did so he said "I have nothing against roleclaiming." That has to be a lie in and of itself. If he had instead used a disclaimer like "I really hate to do this now, but if you insist..." I could understand delaying. I've been known to drag out RCs myself. But if he really had nothing against it, beet should have made his claim much earlier. It makes me suspect that the extra time was spent thinking up the perfect claim.
Combined with all the rest of your arguments (although I wouldn't put nearly as much stock as you do in beet mixing up bussing and bandwagoning) it's pretty solid for a Day 1 lynch. Most importantly, I don't see us building a case against anyone else.
Vote: beetnemesis