They're badly designed. Too much DPS that wipes team weapons with no time to react, too little redeeming qualities compared to Obersoldaten. They should be cheaper but need to upgrade for FG42.
It's not a bad idea but it wont solve their lack of durability which should be higher as elite infantry.
Only 4 man squad make them to vulnerable (squad wipes) when retreating and vs mines,in-direct fire, flamers, PTRS and any armor with good AOE.
Obers are not even call in elite infantry infantry and they have higher durability with vet than falls.
Imo increase falls squad size to 5 but with reduced dps and price.