Yes I agree. I think tactical pace is going to be great for making close quarters smoother to play.I agree with HKFlash, I think the whole point of a tactical pace is to have your weapon already raised, if you fire while doing it you're not going to be as accurate as if you stop or drop to one knee. So no I'd say even though it might seem like we can "run & gun" now I doubt it would be effective for anything short of shooting someone a few meters away.
Also the addition of high/low versions of each stance sounds really neat. There are probably going to be twice as many controls in a3 than in a2. But I think it's going be well worth it.
Obviously the high low Stances will be useful for players to peak up over cover or duck down below cover without going fully prone. But what I am really interested to know is whether the ai will be able to take advantage of these stances to better conceal or fully hide themselves when suppressed. This would be so awesome.