This would be nice and realistic addition to fight infantry surrounding you without whole crew completely leaving tank and being more unprotected. Tank commander also could still use tower mg/cannon, he just need to have option to equip/unequip it with [use] button and go into 360 smg/grenades mode.
https://www.youtube.com/watch?v=4UzJvPnDZs4 On 3:41 there is an example how i think it should look like
Like this
The Sherman used to have a smoke grenade launcher up in the turret. They removed it on later models due to the fact the crews preferred to just throw smoke grenades out of the hatches.
Agreed, though also about the ‘whole crew completely leaving tank’ thing, you can hit ‘X’ on the tank and they’ll hop back in. To my knowledge, once you hit ‘X’ on it, they will stay in the tank no matter how many times you jump in or out until you hold ‘X’ to ‘cancel all orders.’ Blew my mind when I first learned about it, love it.