Is there any mod that gives enemies aim like the lobotomites? It's the only time the game really comes alive for me, gameplay wise.

I don't know if there are any AI types of mods that do what you want. You might be better off with a mod that adds enemies to fight. AWOP does this, the Bounties series of mods (or any by Someguy2000) offer some challenging situations. Project Nevada reduces the PC's perception so you are more surprised by what you encounter.