SC has it's flaws
1. air units - it will patrol but it will not seek & destroy, meaning hit a bit then enemy not around in sight then it will continue patrol
2. ground units - puts priority on path. meaning it will shoot only when in range, it doesn't shoot until the thing burst before moving
3. stupid & ineffective - the units will keep on firing at opponent, even if their LOF is blocked by terrain. so yeah, i had plenty of units lost because they keep shooting ground when enemy shooting at them.
on the other hand i also had cases where that stupid thing saved my base.

4. unit fails to understand priority. say a T3 bot. you tell him to shoot the T2 artillery. he'll keep shooting that direction even if blocked by factory. so you tell him to move. when he moves, he forgets the attack instruction and shoots something else. this applies to the units in general.
however those complaints aside, it's really tactical.
for example. should you
1. spam T2 units? the most cost-effective units in the game
or
2. spam T3 units, damn powerful but slow to build, slow to spam. slow to move too
or
3. spam T4 units, even slower and it gets worse if it get pwned while travelling to enemy base, or worse, when building
4. build strategic missile and hope enemy has no defence yet
5. build T3 artillery lablablabla
i like this game cos it involves a lot of decision making.
+10M and +90E
would you upgrade an extractor or upgrade the factory?

Heard some complaints that the strategic missile has been nerfed seriously that makes it unworthwhile. Did they fix this in patches?