TLDR:Nobody even BOTHERS to dodge RNades. Yes, Molotov is more obvious, but you can also cancel it more immediately. With the RNade you are either left cursing that the unit moves dueing its long parabolic arc (in the few cases Sov bothers to move) and then again that even though your RNade hits the ie:Maxim, it STILL hasnt moved. Sure it takes some MP bleed, but its still sitting pretty doing its suppression thing. It doesnt even care. Couple models lost, so what. Imastayhere and still control this point.
no one bothers dodging rnades because with the input lag it's pretty much useless to try, you may get a little less damage if you're lucky but you lose the equivalent in dps from moving. (unless you are expecting the rnade and move as soon as the gren kneels)
I don't think the issue lies in comparing rnade to molotov, they do different things.
they don't affect the cons/grens engagements as much as molotovs since a decent sov player will simply fight grens at close range
btw I've had great success recently countering garrisons with the ost mortar, it works wonders, but still, once the unit leaves garrisons you're left with the cons/grens engagement with one less gren squad.
decreasing lmg setup time would be a good thing