i just installed this game today and i want to share with few ideas with you
1) There could be some visual alerts in a minimap when: if your flag point is being taken, your building is under attack or you captured a flag point.
2) [EDIT] I think above unit models (when they are chosen) there should be always a health indicator and a symbol (for infantry) that shows what it is for example: medic has symbol of cross, vortigaunt can have lightning bolt symbol and so on.
3)some things should take longer to charge for example: combine claw scanners ability (load the combine mine) should be more expensive and loading mine should be longer
4) there could be ability to see how many matches a player has played and how many he lost or won.
so thats all for now
and if developers not planning to add any more new units to rebel faction then i think there should be more balancing because combines seem stronger