Another idea: Add pages with hexagons.
Good idea. I'll add that at in some point.
Maybe even the alternating up/down triangles for Xia. (I think that was later decanonized, but fans can ignore that, heh.)
Ooh yes, that'd be cool as well.
Plus, put the alphabet key at the start, IMO.
I don't know why I didn't think of that before. Adding that in as well...
Note: There is a problem with that pre-circled page thing, though -- a circle with nothing in it is the letter O even in Matoran, not a space. Spaces would just be spaces. I guess you should still trace over the circles with actual ink/pencil to do it properly. (Might wanna mention that suggestion at the start too.)
That's a good point, but I imagine people would mainly use this for repetitive exercises like writing one letter repeatedly for practice. This kind of thing isn't really practical for anything else.