Yes, it could. There are always exceptions that can be adapted but since the game now allows HE effects with all HEAT it's not really a big issue in terms of game play. All it means is if I change one round to HE and take one off the HEAT count somebody will end up short a HEAT warhead when they really need it someday.
Yes, specific units could be made just for that. I'll paste that to my " ideas" list" for future consideration
.......of course you know that means that someday I'll get a complaint from someone that the RPG-7 their unit uses in the game has a bug becasue all the rounds that hit a tank give no effect
Don