I'd recommend trying to broaden that table out, maybe with bigger letters for the Cluster hit table.
Reason being if it's printed at card size, that font might be unreadable to some people at the size I'm envisioning.
If you ever do get around to the Infantry Cluster Chart, you may have to just double-side it.
Finally, I haven't checked, but have you already laid these out in page formats for printing?
This was something I was hoping to see a long time ago. Especially for all the new stuff that has been printed in other books, like the Dark Age weapons and Armor.
I definitely put my vote to packaging by eras.