I was kind of expecting something like...
Learn beats a,b,c,d
Then learn these fills a,b,c,d
Etc
I get the feeling that learning drums is an "all in" proposition. You have to be dedicated to it.
You can certainly learn that way if you like. You were "expecting" it which implies maybe thats a way you would prefer to learn.
Yes drumkit is an "all in" instrument with a vast suite of skills. But you can also spend tons of time on specific little things and never regret that either.
Actually I like this idea of yours. Pick a style. Funk for example.
Beat A: Funk pattern with 1/8th note hihat.
B: Funky pattern with 1/4 note hat. Now the off-beat notes will sound more interesting.
C: Now with two-handed playing of 16th notes on hats.
D: Same beat as B but the 1/4 note hats are played on the off beats (The &'s). Try to keep it linear sounding with the bass and snare..so funky.
Then basic funk fills to go along with them: A, B, and C.
Then do the same for Rock & Roll. Then maybe 4 versions of funky shuffle patterns.
It all just depends on how you organize the exercises. That's what drum technique books are after all. Useful but somewhat arbitrary. Anything can be useful as a practice exercise if you formalize it into some drum tab or notation.