Comparing anything in disco to real life immediately lowers the value of your argument.
Nukes were fine and I'm not entirely sure if they were changed that drastically, they required you to have situational awareness and let you finish fights quickly when your opponent was making mistakes. I think they should have larger damage radius but less hp. Instakills are good.
Screamers are fine as they are.
CDs should be returned to the ammo count they had previously, it's not the community's fault that Haste can't pvp.
There is also a change I suggested some time on TS and it is to implement guns that are copies of some existing weapons (Flashpoint, PG, Heavy Flashpoint), but they take no energy and do less damage. The DPS drop should be significant (about 50%) so that someone using the regular version of the gun and hitting every shot does more DPS than someone using the no energy one.
Alternatively faster refire speed weapons should be buffed again.
After implementing any of the two above, auxillary slot should be removed.
Sidewinder should take a CD slot.
TL;DR of the above: Revert all changes Haste did since November last year.