Understood - pre-buffer tone controls could make sense for those who want to minimize wiring changes, but I think they'd be missing an opportunity to really free up the pickup (now on sale: "Free up the Pickup" T-shirts!)
You're right on the effect of the 10k pot on cabling, of course (I knew...
Jerry, thanks as always for the great work and for sharing it! Coupla questions:
You suggest leaving the passive tone control in place before the buffer. Why would one do that? It would still load the pickup, wouldn't it? And with an unstable (variable) load at that. I would use the tone...