Calling it now..
There's going to be so much bitching about 1HK weapons then ever before.
Get reading Bungie. No manner of ammo economy is going to protect you from the feedback.
Hopefully bungie don't listen to a thing people say. As long as heavy don't spawn in the first 10 seconds of the match and 30 second there after for the entire match. I think it will play fair.
Secondary ammo will be limited to some. Only having one bullet everytime they spawn.
I don't think it will change much from what it's like now. There is people camping heavy constantly and running shotgun. I've found a few camp snipers.
What people should worry more about is the maps. We need panteion to come back.