If refire is reduced it will affect PVP, and also CD spamming doesn't work as well outside of Conneticut when using bats/bots - you simply don't have enough ammo to keep it up.
Due to server lag you sometimes have to fire several CD's because tracking is messing up. If the refire rate is lowered it would lead to a lot of frustration when players manage to run due to a laggy server and not due to skill at evading CD's.
When you see the servers PVP fighter-aces duking it out, they are quite skilled at dodging the mine/CD combo with the current explosion radius - I think that it is all dependent on the skill of the player. Even when you fire your CD in PVP it is based on skills - some get the timing right every single time, and others don't. And using the reinforced cruise disruptor on a fighter isn't really efficient in terms of energy usage and refire rate, so we already have a CD aimed at the larger ships.