I sort of like the "no fog of war" aspect, though not for bushes. Leave bushes alone.
Perfect positioning makes Bots passive. I think the Bots are passive enough as is. If anything, they need to be more aggressive when pushing a lane. The reflexes are already fairly good.
I think you are basing your Level 3 Bots on your success at killing them and are trying to build their defense. Honestly the old adage of the best defense is a good offense applies here. You can't expect them to play more defensively and win. What you need is an AI that is ruthless to the point that it actually makes sense warding or you will die. In Intermediate, nobody wards because the bots don't pose any threat. It's an essential game mechanic entirely lost on PVE.