If you are switching pickups... Q timers as meantioned, or something using Er I can’t remember what it’s called, different technology , lace alumatone, villex ...
but if it’s a Warwick streamer with an active pj set - it’s never going to have a piezo tone but I would change the preamp before the pickups. Personally I would get an east Uni pre but other hifi preamps are available. I think that would make a bigger difference than the pickups