If you can buy it, distributing it massively for free is not good.
Basically the same as asking if you can put a movie for mass download if you bought it.
I would say story quests could also bring more in 4.0.
The duke Casino and whatever they want to do with places like Area 7 would provide an opportunity for bigger challenges.
Don't they spawn a single swarm at a time?
Personally, I've never had any difficulty dealing with the swarm, 1 melee hit and it's gone. It's more been an annoyance to have to get down my bike to melee the swarm than anything.
Jars being craftable using the crucible was discussed way before the patch notes. I feel like this is either:
1. They forgot to say it in the patch notes so the media manager made a mistake.
2. It was still in discussion when the notes were published and thus they amended after.