i experienced usually this:
bot wants to throw grenade
he stops and gets the nade to hand
then he spins on the place he is and finally trows grenade on the floor (or any stupid direction)
and usually nade lands exackly under his legs
and boom
they should trow nades faster, and i was thinking if it is possible to write simple algorithm so that bot would predict at least one or 2 nade bumps from the wall or ceiling