I dont know if this has already been mentioned somewhere on the forums but incase it hasn't:
Ive noticed alot of people complaining about players spamming 1-2 types of units and ignoring the rest. To combat this, why not introduce this idea where for each additional unit of the same type takes up extra fleet space.
Example:
Your first LRM takes up 4 fleet points.
The second one takes up 5
The third takes up 6. etc.
Either that or the first three take up 4 each, then the next three take up 7 each, etc. There could also be additional research added that allows people to spam certain units, but also has some negative effects to it (maybe very expensive or reduces combat effectiveness of other units?)
This would pretty much force players to build more diverse fleets because when crunch time came, a fleet made up of spammed units will only be half as big as a more diverse fleet.
Any thoughts?