1. When the mission starts, the deployment area is always partially obscured by the Roster window. Since the Roster window doesn't float like the command window you have to do a lot of wonky scrolling just to deploy the units you want.
2. The AI refuses to destroy bushes despite the ease it'd be to pass and the fact that I'm range bombing them to death. Now I'm guessing the level would be too hard if everything aggressively bushwacked the terrain for us, but once they've come under fire, it seems like they could go from passive to aggressive to enraged, the last state would destroy non-player terrain if there's no valid path to targets.
3. Even if they couldn't destroy the terrain, they foolishly kept their melee in front and in firing range, keeping their own ranged units from counterattacking successfully. Some kind of "Flee bombardment" behavior would make the AI more human.