How about we make it more game show like. Every once in a while, very rarely and only once a game, there should be this spinner that appears in the bottom of your screen (or top, or where it doesnt block much) and it chooses a random event like, every one becomes immediately juiced for the next 20 seconds, double cash, every turret gets an upgrade, all turrets and bots are destroyed, etc. it sounds like it would be a ton of fun and most of the stuff wouldnt be gamebreakin since it affects every one. also, please make the Tank's turret thing more useful.
Tank's deploy is pretty useful. Do it in front of a laserblazer or a group of bots that've stopped for what ever reason? Poof! You're juiced, buddy.
lol c&c renegade had a mod like this. every once in a while, a random crate would appear in one of 10 common choke-points of the map. and it could have good or bad effects. the collecter of the crate could die instantly, die while your corpse turns into a computer-controlled-mutant that attacks everybody and everything in the area, set off a nuke (which would die, but also kill and destroy other people and vehicles too close to him), could cause all his buildings to lose 50% of current health, could lose power temporarily to their base (no base defences means you could have everybody sneak in and put c4 in every building in 30 seconds) the collecter of the crate could also get an additional weapon to his class (the best thing is getting a repair gun as a offense class, like getting a hurt/heal gun as an assault or assassin lmao), or get all teh weapons (including many bricks of c4 and both nuke/cannon beacons that instakill buildings when set on them), get automatic health refill upon losing all health, get stealth effect during their current life on their current class (a stealth sniper or engineer with c4 is epic), give them a random class switch, get added maximum armor and health, or reheal all teammates and vehicles and buildings on your team or the crate can cause some epically wacky effects for both teams. like an emp kicking everybody out of their vehicles and leaving them inaccessible for 30 seconds (the teams then kill each other on foot, and the winners get the losers vehicles), or a crate resetting everyones money to 0, or causing everyone to respawn, or giving everyone stealth effect for their current life.