If I did it, it’d be for platoons (each model is one tank or one squad) each activating under the NEIS mechanic.
Keep combat really simple so you could have like a million 6mm tanks on the board. WHo knows.
Your ideas aren’t bad at all. In Company Commander, the HQ stand is an active participant, mostly for rallying purposes. I think Jack talked me into it.
I’d be inclined to keep it as simple as possible (may move, may rally by moving into contact, may not fire unless it has attachments)
Nordic Weasel Games