These look good! I like the fact that you've redesigned them to work better in small scale.
It's hard to group them sensibly. I'd say that most people will want the markings for one or two divisions, so you'd be looking at a separate decal sheet for each formation. That seems a bit crazy in terms of packaging etc. There will also be formations that are more popular than others, so perhaps you shouldn't try to cover all of them.
A wargamer is going to want several sets of markings for one formation. Perhaps you could package them for specific campaigns. You could provide (say) 5 decal sheets, each one with several signs for a particular formation. So, Normandy would have decal sheets for Panzer Lehr, 21st Panzer, 116th Panzer, 12th SS Panzer and 504 Heavy Tank Battalion. You could also have a set of decal sheets for units that fielded a particular tank (like Tiger battalions and StuG brigades). I'd assume you'd want to focus on vehicles that Rubicon produces...