I finally got to play a gig with my JCS on Friday.
We did the Stone Roses' "Waterfall", which is a lot up around 10th fret, and it sounded very sweet and musical to me, and didn't get in the way of the guitar, which is a danger with that song. I liked the low end too. Guitarist asked several times if I was going to keep it, which by the end of the night turned into "you are keeping it aren't you?", so I count that a success.
I looked at what was involved in reconnecting the tone pot and decided not to bother. So far I haven't missed it.