The thing is, you can't directly compare vet 3 bar rifles to vet 3 lmg grens or what have you.
Vet 3 1919 users (the 1919 is essentially a LMG42 stat wise)? Because these changes taken as a whole are going to make Infantry Company basically the go to doctrine every single game because it gives you Schu/Soviet mines on your basic infantry, the highest damage artillery unit, vet 0 sandbags, ect.
Rifles may need slightly more since the USF relys so heavily on them. USF doesn't have access to as good of an mg as the Brits, nor do they have highly durable armor. This forces rifles to be the centerpoint of your army, and thus they should sale better than other infantry.
With the new changes to the .50 cal it will easily rival the MG42 in performance, (the faster pack up time easily making up for small arc). Basically USF before this patch and USF after will ve totally different animals. Remember that the Sherman is now a PIV as well.
Remember everyone! All changes have context.