I got one pio squad whiped by a molotov. And not because they were staying in the fire, but the explosion ignite them all instantly. Just saying, I don't know if it's wrong or not... anyway it's clearly a different game....
This is not something new, the odds of this happening have not changed. It has always been pretty easy to hit all 4 german guys with a molotov so if anything I would say the molotov is a bit weaker now that it is easier to dodge.
I'd say the biggest change is how great rifle grenades are now. At Vet2 they can fire from super long range and it's so easy to nail big chucks of squads now that they bunch up so much. All other grenades are rather obvious because squads have to close in before throwing one so it's easier to see them coming.