In the "Teaching Forum" of this site there are discussions about developmental repertoire and lists of suitably graded pieces along with ideas for an instructional programme for "developing" bassoonists.
Search for the <Topic: Bassoon Scheme Beginner to High School Graduate>
The statement, "More interesting than Weissenborn," varies with what I have found as the most valid and musical set of studies for any musical instrument. We are so lucky to have that resource.
The Method chapters have an amazing range of searching and musical etudes informed by a deep knowledge of the instrument and its repertoire.
The 50 Studies, that come with some editions of the Method, further challenge the player with real compositions of musical merit.
Of course there are many more pieces that can provide development, but I recall the admiration that William Waterhouse had for Julius Weissenborn, and regard one of the great moments of the Melbourne IDRS Conference, as that when Will presented his research on Weissenborn. I remarked at the time that on stage there, were the two most influential bassoonists in my career.
Do take a look at the "Teaching Forum" ... and keep coming back to Weissenborn at appropriate stages of your development. Best wishes and good bassooning.
Christchurch New Zealand
Bassoonist / Teacher / Conductor