Not necessarily a bad idea, but it's way too easy. In less than 5 minutes, I had wiped out his initial force (all Eagles) and killed his ~5 Bullpups. I then marched my Hydras in and crushed his second, unlaunched force (a few Libs, a few Hydras, a couple of Eagles). The AI cheats a bit, as he doesn't have to build a research center to build upgraded vehicles. Anyway, I left one of his power generators alive and built about 25 bullpups to mine the 240,000 credits of g-lite hanging around.
Ideas -
Leave the map blacked out; it would be MUCH harder if you didn't know exactly where the bad guys were and what they were doing.
Give multiple paths, rather than just one, making it harder to completely cut him off so quickly.
Think about making the bad guys build an HRC and a VAC, rather than two VACs, because when all he has it vehicles, all you need to build is Hydras - everything else he wastes resources on is chaff against them.
A much-appreciated idea, though, as it has always bugged me that the bad guys always have massive bases to start missions, while I have to "waste time" choosing locations and building up the forces.
-Sean