2. Andralor is right Astra do not suck early they are great.
You can have over 20 units by turn 40.
Grenades and medikits are your friend.

3. Bullgryns cost too much is my only concern. Reduce them to 30/30 and they'd be fine.

Yes being able to mark/draw on the map and or ping would be good.

No, the best faction in the game does not need an economy buff. In fact, their economy is very strong.