There's a couple problems with current AI.
The grenades are perfectly fine. It's super awesome to spot a nade and run to safety in time. They sometimes cook them too much to run, but that's ok. It's war after all. But molotovs? Molotovs just kill you instantly. Just now we lost a match because 4 of us got burned to death by laser-guided molotovs on one objective. It's a bit ridiculous, especially when they do it without any line of sight.
Most AI seem to run with pistols a lot? And 10 out of 14 AIs seem to be the breacher class? Is it some intentional handicap to make them easier or something? Please make them use a bigger variety of weapons, like shotguns, lmgs etc. And maybe bring back Grenade Launchers. Just make them super inaccurate and finally add the travel-safety-distance so they don't blow themselves with them alahu ackbar style.
They seem to have been nerfed a little. I think there should be only one IED per objective. Their detonation time should be only slightly shorter than it is. And if the phone rings, it should explode, regardless of whether the guy lives or not. IEDs should be terrifying. People should struggle to decide in that split second whether to shoot or run. Currently, there's a bunch of IEDs per objective and its a bit silly and non-threatening to just shoot them... They only do anything if they sneak behind us and we are distracted. Instead, the IED guys should warn about their presence with some cool voice call. Now that would be awesome and would greatly add to the games experience, authenticity and feel.