I thought fire grenades no longer strip your toughness? They still do. Also “slightly increased base damage” traslates into losing 100 HP in 1 second, if you don’t manage to move away from the blast before it explodes. If you consider the crazy angles (locations you often cannot reach) nades can be thrown at you from, this is a bit silly. Flamers also feel overtuned.
I watched few of my mates just melt, and they tried to dodge the damage.
I would give it few more days, maybe a week before making my mind on these fire changes, Fire is a much bigger threat now.
I just keep in mind that before the patch we a lost a game because my ogryn could NOT jump over railings after a nade exploded on a walkway I was standing on. After this change I doubt I could even manage to attempt vaulting second time. These changes just make some other bugs and issues even less fun to deal with.