This is my list of things that should be added to Ace of Spades:
1. Addition of a primary deploy-able machine gun
2. Going on top/near/close to a weapon recovers 25% max ammo for all items except for blocks and grenades
3. Grenades can be thrown back
4. Smoke grenades? in the grenade slot
5. Doors/Entrances, panels?, ladders, etc.
6. Traps?(fake blocks that break when stepped over, spike blocks that do lots of damage, mine blocks that explode?, etc.)
7. Plan A: Addition of extra classes:
Heavy class- machine gun that is deploy-able, spade, 50 blocks, 3 grenades
Builder class- pistol, spade, 75 blocks and has 25 traps(10 fake blocks, 10 spike blocks, 5 mine blocks)
Medic class- pistol, spade, 14 pills, 4 health kits, 50 blocks
Plan B: Being able to pick-up dropped weapons(which gets rid of idea #2)
8. A good anti-cheat/banning system(steam integration?)(This should be added when/if the game stops being free)
9. A main menu with a server browser and options
10. A official "creative mode" where people can build a map together?
11. Optional Hardcore Mode:
1.Small bleed-out(bleeding that causes health to drain) upon damage(For a few seconds only)
That's pretty much it but more might be added/removed ;)