Even with perma-cloak, this unit has no viable niche in normal gameplay due to its high cost (time and ru).
Build time down:15 => 12
Cost down:130 => 120
Research time down:100 => 80
Defenders
Research cost is way too high for a unit primarily designed to hold or bolster rush tactics. Defenders have very little other practical use, they don't need pushing further into obscurity.
Research cost down:1000 => 650
Research time down:75 => 60
Projectile speed waaaay up:1200 => 1800 Slower than ints (1900) but faster than multiguns (1700)
Drone Frigates
Still extremely undesirable in comparison to other anti-fighter options, drone frigates simply struggle far too much to kill the unit they are designed to counter.
Build time down:60 => 50
Max speed up:206 => 230
Drone shot projectile speed up:1700 => 2000 (kus_drone.wepn) For comparison, an interceptor shot moves at 1900 units/s
Heavy Cruisers
The idea of HC being a real threat in combination with support frigates is definitely valid; however making the unit cost so much its a completely unviable option (aka removing it from the game) is really not a great solution.
Research cost down:6000 => 5000
Ion Cannon Frigates
HW1 ions currently rock the competition, especially when paired with repairers (rep vettes get a bonus here since they are very resilient to the type of units ion cannons are built to fight such as other ions)
Build cost up:700 => 750
Scouts
Scouts currently provide totally free and nigh-undeniable vison for the user if waypointed in a double-passive circle. Even in a freak accident where your opponent is able to snipe a scout squad, they're easily replaced. Vision is a resource to be fought for.
No longer get a max speed boost from evasive tactics:1.1 => 1.0
Primary sensor radius down (blue sphere in manager):8000 => 7000
Secondary sensor radius down (works the same, but invisible):10000 => 8500
Support Frigates
Worth a little too much; a little too good, a little too cheap
Kushan
Cloaked Fighters
Defenders
Drone Frigates
Heavy Cruisers
Ion Cannon Frigates
Scouts
Support Frigates