I'm also pretty sure you can attach heroes to these squads (at least the Axis ones - we have no Armor 1 heroes), but it would be nice to have this explicit in the rules somewhere, referring to these new unit types.
I just got an official answer from FFG stating that you can attach heroes to the weapon teams.
Dear FFG, please don't stop the Tannhäuser line completely! Maybe just step down the release of new product to two (maybe one) characters per year just to keep players interested. Maybe release mercenary characters that would be useful for every faction thus every player. Maybe release a pack containing all the existing bonus tokens but no miniature. Anything, please!
I haven't played with any of the heavy weapon teams yet, so I'm not the best to answer this, but here's what I would do:
1. If the model has 2 wounds+ remaining, they can fire the primary weapon plus a number of secondary weapons equal to the number of remaining wounds
2. If the model is reduced to 1 wound, it can only fire one secondary weapon of it's choice (assumed to pick up one of the weapons lying on the ground).
I would also apply these rules universally across all factions, as I dont think armor rating should constitute a limitation against the Axis. What you gain in armor rating you pay for in points, so its balanced that way. Would these house rules solve the issue?