Always been a fan of the mw style killstreaks, and perk setups. I don't MIND scorestreaks, but wouldn't want them if offered the choice. So, mw of some kind.
If the mw remaster was the one on the table, they at least need to make a bunch of new stuff. More maps, or remaster all the old maps and give them an update.
My vote: mw4. 3d fighting is optional, but stick to 2d please.