Sorry for late reply
For icy or slippy problem, though need to be fixed, at least I can play with your BOT on map with normal terrain.
For example, non official maps such as op4_ctf omen, it's pretty simple map, and the BOT wouldn't get any problems there.
As for carrying an enemy's flag to their base, though they don't consider no longer have a flag, I think it's not a big problem. As long there is a correct waypoint from one flag to the another one, they will following their path without trouble