The requirements for SG in the new campaign looks a bit iffy as Battle Arena is usually a complete curbstomp for either side and there's basically no way to properly ensure your team wins when yours is the one getting stomped.
At best I can just camp out on my team's side of the field to get the "least deaths" reward when my team is getting stomped because I pretty much never manage to get that many kills in to begin with that don't wind up with me dying and making all those kills a moot point because someone thought it was a good idea to make it so the enemy who kills you gets half your points...
Honestly a proper deathmatch mode would be a welcome addition, as well as KotH and CtF modes.