I just got volume 9 as well. It's great having the first 49 issues spread across 9 volumes, and seeing them all lined up on the shelf really hits home how far she's come over the past 4 years. Even if I didn't also have the entirety of ANAD Avengers, the entirety of Secret Warriors, and the first two volumes of Champions also, 9 volumes of Ms. Marvel is still an impressive feat. It's a damn shame that, as seen in certain other threads from other certain posters, the character and her author are unworthy or do not deserve its achievements due to a variety of reasons.
As for Teenage Wasteland, while I like reading the stuff as a whole, I admit part of the appeal of the arc of no Kamala is lost because it's not happening across months as it was initially done in individual releases. Though I suppose part of that depends on how invested you are in the idea, or if you're used to reading individual issues VS trades.