The "Molotovs are easy to dodge" sentiment is a pile of crap.
Not only does the squad bug out due to a member spontaeously combusting, but it doesnt react either for an immediate dodge. Micro requires a 2-3s reaction BEFORE thr Molotov isthrown to not suffer the immediate hit with its fking criticals on Ostheer.
You're sort of correct in that it does require ~2 seconds to clear a grenade most of the time. That's why the Molotov is the easiest to dodge: it has the longest and most obvious animation windup of them all. It detonates on contact so you have to be moving before the grenade is thrown. I find that unless my attention is split in too many directions Molotovs are easy to spot and thus dodge.
Other grenades don't have obvious animations but have a timer before they explode so you get a slight tradeoff.
All in all though, I sort of agree with the original post that infantry responsiveness sucks. Is it worse than the original CoH? I dunno, but it ain't better!