Fraggers mini nukes are ridiculous at the moment. There is no counter (except pineapple juggler. Lol). I would like to propose a realistic and not too annoying counter, meaning this tank on wheels can become counterable.
If Fragger takes 50 damage in one shot while cooking his nade he will flinch and drop his nade. This would mean that he would; A, need to be more tactical in his throws and, B, be counterable. Seeing as the only real things that do 50 damage are snipers, shotguns, the driess and the rez gun, this would mean that Fragger counterplay would be a thing and not too wide spread.