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)
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
Taiidan
Defenders
Heavy Cruisers
Ion Cannon Frigates
Scouts
Support Frigates