This is rather a question than a suggestion.
Are SCU worth anything? I feel like they arent. you never see them.
First you have to build a very expensive Quantum Gate and then the use of SCUs is very limited.
Cant we do something bout this?
My first idea would be Quantum Gates should build all units (if they dont do this allready). In this casethe cost must be increased t match the cost of a totally upraded t3 factory (4190 mass for example)
SCU costs 18x the mass of t3 eng, and only have x4 buildpower
SCU costs 10x the mass of Harbinger, and only have x0.53 DPS
Ok their only extreme bonus is their HP, which makes them probably worth it for being the engineer on a drop so you can build before it dies instantly.
it has 30x the hp of a t3 eng and 5x the hp of a harbinger (incl shield).
But still the cost/use factor is very bad I think. The only way I can imagine, someone builds them is, if he has a Paragon or plays an x2 game 1on1 on Setons.
I would not buff them a lot, because a Support CU should not be incredibly stronger than a ACU which it is already right now, if you check the HP. I would first think about reducing their build cost dramatically.