Seeing the signs?

[Edi]

Insane commanders may or may not do what you want them to do. If they get a fit, they will change orders randomly in the middle of things and can therefore screw up your army and plans quite royally, or they may do exactly as they are told. You never know.

[thejeff]

Some of the random things they do include patrol and research.
Unfortunately, only Rl'yeh's own commander seem to prophetize themselves.

The most annoying thing to me, is that the crazy orders persist. So once you've got a few crazy commanders, you have to check them all to make sure they're not still "ftaghn"ing.
From a micromanagement perspective, it would be much nicer if a commander returning to sanity and willing to take orders again was reset to defend.

[Torin]

that is not a star