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The "Balance Commander will have some issue". Because it build many kinds of unit so it need upgrade for each kinds of units. For example, terran will have upgrade marine shield, stimpack, banshee cloak, ghost cloak, siegetank, hellion, reaper speed, thor strike cannon, raven missile,... Think about it, it hard to achieve all these upgrade. So it must beneficial to focus on 1 or 3 type only. Unless the AI have plenty of resources, it will build other kinds of units.
To find a fault is easy; to do better may be difficult.
The "Balance Commander will have some issue". Because it build many kinds of unit so it need upgrade for each kinds of units. For example, terran will have upgrade marine shield, stimpack, banshee cloak, ghost cloak, siegetank, hellion, reaper speed, thor strike cannon, raven missile,... Think about it, it hard to achieve all these upgrade. So it must beneficial to focus on 1 or 3 type only. Unless the AI have plenty of resources, it will build other kinds of units.