Isnt M3 Vickers just reskinned Bren with same DPS curve, as far as I'm aware both weapons got nerfed unless droppable Vickers was left out for some reason.
That's wrong - brens were nerfed, vickers weren't. Even then, current brens are still slightly better than DPs, so vickers and old brens were noticeably better.
Also Guards with 2xDP still deal less dps than Grens with LMG42 (thanks to PTRS)
That's also wrong - it's even less applicable when you consider the fact that DPS calculations don't factor in the fact that engagements start with a single shot, favoring the ptrs.
As for Penals vet1 - it's 3% RA for dead model, by the time you'll get more than 10% bonus you already need to retreat. Besides point still stand about 2xBren IS and LMG/Bar rifles - they are better or at least equal to Penals with 2xDP, there is no reason to single out Penals considering their cost
Almost entirely wrong or irrelevant. DP penals (not vickers) are roughly equivalent to double bren sections, sure. Vickers penals destroy both (again, assuming all squads vetted).
Besides the point, but if you're retreating squads at 2-3 models, there might be a l2p issue somewhere.