I'll second that Rush thought. If they could fit Conquest, why not Rush as well? Make it a short (2 sets of MCOMs?), multi-round mode with a tight time limit. The chaos would be glorious.
In case you haven't yet, unlock the SPAS-12 as quickly as possible. It's the weapon de jeur at the moment, and with good reason: slap a holo/red dot sight, extended mag and flechette ammo and it's unstoppable on these small maps. I set a record for kills I doubt I'll be breaking any time soon. Just make sure to aim down sights when using it. For some reason, I found it nearly impossible to hit anyone from any distance when hip-firing, even including point-blank.
Only map I don't like is Scrapmetal/Scrapyard so far. Too layered vertically.