I agree with Zinovia that without pictures they are not that useful. More importantly, you should definitely not put down the roles of the monsters or their levels. Are you expecting this tokens to be placed on the battlemat? Before seeing the PDG I would've said yes, but after seeing the PDF, there's no way these could be used in front of the players.
Also, IMO, you don't need to number minions. That's the cool thing about them. I do like the numbers of other monsters, but I'd prefer to see them as a superscript or some other visually appealing method above and beyond a descriptive picture. Also, don't number individuals. Sir Keegan doesn't need a number. He'll never replicate!
Right now, I use 1" circular wooden disks from the craft store (for medium/small) and 2" for large (etc.). I hand-wrote numbers on them, so what you provide here doesn't help me at all. Now, if you put pictures on them, I would definitely be able to tape them to my disks and use them. No longer would hte players joke about "Oh, no! We're beset by numbers!"