I just did a test in cheat mod and 5 Men Grens won 3/4 at medium-long range at Vet 3. The one they lost was because Cons got a lucky early model kill and swung the engagement. You're welcome to provide evidence to the contrary but I don't really believe that they lose at longer ranges. Both upgrades add an extra model and Grens natively have better long range DPS. The STG also has better long DPS than the G43 as well so I don't see how losing the 10% Racc means they suddenly lose to Cons long range without the LMG42.
This is my go-to commander in most games. VSL squads don't struggle with Cons. The extra model makes engineers really durable and more useful than ever. There is so much indirect in 4v4's that the LMG42 was a mixed benefit anyways. If I had any wishes for this commander, I'd like the bombing run to kill howitzers instead of decrewing and some damage, even if they increased the muni cost. Also, too many of the abilities are muni based. Drop one of those and let me build JPIV's and this would be my commander in every game.