At first i was a little pissed as well because of the loss of ammo when changing in between secondary and or heavy weapons. I was like: "They should fix this!"
But.....the guys are right,...it would be like putting Rockets into a Heavy Machinegun. I also think that you have to think more, adapt to a situation etc.
So right now i am more into: "..they should leave it as it is."
IF they think of change something i woulf recommend
that ammo types can only be kept in stock if you change in between the same type of weapon.
From one rocket launcher to an oter one or one heavy machine gun to another.