There are a few threads on this including in the Tripster thread so worth checking those.
Like you I’ve tried all sorts of set-ups on several bikes and like others found compressionless cable makes the difference. Personally I don’t think they’re any better or worse than BB7s but a lot less faff and better clearances. (On the outboard not the inboard!)
Tried some different pads from Disco Brakes and they made some difference, stock ones wore down really fast in the mud and grit.
Latest trial is HyRd on the front which seems ok so far and certainly no difference in feel and modulation between it and the Spyre on the back which surprised me.
Main problem has been judder on carbon forks. Nothing has really sorted this and I don’t know if it is the QR not being tight enough or what, but it’s not particularly confidence inspiring.