Navigation and design: It’s still easy to follow and navigate. The only thing perhaps is what @david mentioned about the green buttons. I missed some tasks but they got ticked- I don’t exclude the possibility that I’d ticked them though-, so it’s harder to find them now.
Content: I really liked this unit but as @paul-m said, fiddling around with H5P will be beneficial. I’ve tried it but I wouldn’t say I’m comfortable with it as yet.
Timing: Material creation takes time but again being more comfortable with the tools will speed things up.
Difficulty: It’s absolutely doable but does take time.