I don't think any of what you want to tell him is necessarily unreasonable, but at the moment it sounds more like your frustration venting than a hope he improves for future students. The best you can do for him (I think you mentioned in another post that he's sort of a friend?) is as you've said, gently point out areas of improvement whether through official channels or not and hope he takes them on board for a future cohort.

But the best you can do for you with finals approaching is not dwell on how he could have been better - put your energy and frustration into studying so that his shortcomings as a teacher won't reflect on your final grade?