The practice pad is a good way to evolve, I have only one and I follow some music on it, it's practical to practice at night. Soon, I'll add the rudiments practice on the same pad.
I practice jazz so I developed my own thing, I have a general exercise guide called the jazz drumming system with comping, slowing, fills, brushes, music in 4:4 3:4 5:4 etc. I have another comping book, I have books from John Riley with more specialized things in it. One day it's snare comping, the other day is bass drum, snare and bass drum, hi-hats, the other day is fill, setup and hits, independance exercices, easy play along song, harder play along songs.
Listening to a lot of music.
I'll see if it works in 1 year but lately I was happy with my improvements. I do this as a hobby.