Title says it all mostly. If I have already made a thread like this in the past just say so and link.

Flag carrier melee attack becomes the flag which has a longer range
Flag cloth is cloth physics (will need to add wind so it can be seen from above easier, though the yellow circle thing should circumvent that)
Optionally Making the flag a banner style would make it easier to see with wind
Each team should have its own flag and be trying to steal another teams flag)
Diagonal tiles
Map decals
objects on map (Crates and barrels and other stuff that can explode, be destroyed and moved about the map by pushing). Also interesting things like superweps or cars could be placed on a map and respawn after a min or whatever so people rush for it.
WAR mode (large scale maps, lots of players with single games played over a long period of time and the game revolving around various objective types)
3d models of everything (cars, players, flag, et cetera)
Physics to make the above fun (cars rolling over, ragdolls flying on roadkill deaths)
Six seater Camper vehicle

Make 256 players in a server possible
Neutral and team objectives for EVERYTHING (neutral flag and radio in middle, team trucks etc)
Advanced game/map combo queuing - hosting where you could have tower doing flags then next game is Foundation with trucks, then tower with radios this time (also with ability for varying things like time limit, bots, money rate. Because some maps are better than others for different things but probably limit it to a single game mode (Battle, Extraction, checkpoint) to avoid confusion