What about theme?
I think the default needs to be the loss.
It’s too abusable in any other way.
The key is to proportion the loss appropriately.
And maybe have some sort of get out of gaol card for the last couple of players left.
I don’t think Smurfing itself is as bad a people make out. TrueSkill2 adjusts their MMR very quickly - so while their CSR is slow - their Smurfing time is very limited.
The problem was definitely squad manipulation. And 343 have taken steps to address that.
Sorry, I’m not sure what you are actually pointing at here?
The system mainly cares about the loss. And how you went vs expected.