They did that because people just slam out Heavy weapons 24/7 for invading and anti-invading because it’s just easy kills. Bungie did that on purpose as a result. So, you can choose between buying those precious seconds for your team by stalling DPS on the opposing team, or you can focus on getting motes or DPS your own Primeval. You can thank the community for that one. It’s my favorite mode too, but the spawn rate of Heavy Ammo genuinely ruined it because now all I ever see is people spamming heavy 24/7 and it often forces the invader or whoever fights the invader to do the same. People in the community that complained about every minor inconvenience and demanded nerfs are just as responsible for the game’s decline as Bungie is, but nobody is allowed to say it out loud or people will be toxic and disgusting towards you. It’s sad but that’s just the way things are here nowadays.