Hello and welcome.
Id say if your happy with the feel Of the bass, just pop in a new set of pickups. Sounds easy! This is where the fun starts. I’ve used Delano, Aguilar, Bartolini, Fender custom, and Lindy Fralin. I like them all. It takes a bit of research. The other option is to fit a new preamp. The John East preamps are excellent. Enjoy the search!