Exactly. I think the iPad lineup just needs the Pro (in two sizes) and the Air (maybe, in two sizes as well, including the 10.9” and a smaller one). And maybe keep the base iPad for students.It's been a confusing lineup for years - even the iPad Pro you have no idea that the 12.9" model has a much better display than the 11".
This is what Jobs did when he returned in 1997 and saw the plethora of same Macintosh models that their product managers couldn't tell him why they existed or what differentiated each one, so he scrapped them all and went with what we knew for years, one consumer and one professional laptop model and one consumer and one professional desktop model