They can be flashed:
When a flashbang explodes near them, They stops moving (like in real Cs);
The time that they'll be stoped depends how near was the flashbang.

They can "communicate" by Radio:
When they receive a shot, it's probable that they say "Taking fire, need assistance";
When you say "Need backup" it's probable that they say "Affirmative" if they can;
If they start to reload, they say: "Reloading!" (just like Left 4 Dead);
If they have low hp, it's probable that they say "Cover me";
When they see an enemy, can say "Enemy Spotted".

They use the knife, flashbangs and pistols too:
They walk with the knife, and when they see an enemy, they change to their rifle (like an human);
With less probabilities, they can change to a pistol, a flashbang or a smoke granade.

They play a bit worse:
If you are one of those guys who complains of the incredible aim of bots, well, they still have that aim, but they have a lower reaction, so they wont kill you in a second like befor;
They can't collect items or plant the c4 bomb.