How can we make bots more useful?

The idea here, bots would have no way to defend against air (since air are the area control units) but allowing the combat engineer to create bunkers that could defend against air might make them able to "lock down" expansons easily, but tie up units in the process.

It's really weird to take your fast raiders and immobilize them. I don't like that in concept.

If the bots are designed to have infantry roles, then they should probably get a longer sight range. After all, infantry are often used as the spotters to give intel to armoured units.

Also, infantry have Stinger missiles, not the most crack hot AA ever, but certainly gets by, and allows them at least a fighting chance against air forces.

Also, in real military structures, infantry make up the greater bulk of unit composition, with tanks being used sparingly, and strategically.