i like the idea of ketten's capping territory, how about adding in armored cars as well, it'd be like the armor doc with m8, m3's and t17's for SE you have scout cards, armored cars and kettens. How about some type of doc buffs for the IS, maybe increase rof or decrease cooldown or something. Lower cool down on all types of fire abiliites (mortar ht and flame nades) I'd love to be able to booby trap trenches if that's not already able to be done. More than one use or a cool down on booby traps. I don't think a cool down would be that big of a deal, especially if you make it like 3 or 4 minutes (so you can't just saturate an area on defense by using a squad more than once) decrease in rof or cooldown on g43's. I dunno.
SE munition ht could get extra mines, and armored cars could get a mine drop.