Gameplay wise this is also annoying as it´s not compensated for. Dual Bren LMGs melt through any infantry faster thahn the LMG42 while the ammunition is not as important as it is for Wehrmacht (Bunker upgrades, LMGs, Riflenades, more expensive Tellermines and minefields). Having the longer stick in everything is plain annoying.
Thus there is the 2nd part of my post. Good tanks and good infantry upgrades and multiple potent commanders without real drawbacks to the faction does not work for Brits. The least that could be done is to take caches away from Brits to give them somewhat OKW like drawbacks.
the bren gun is factually weaker than the lmg42 despite costing the same. the only reason why the bren is overpowered at all is the ability to dual equipped them.
of course, vet 3 tommies also have the pertinacity to drop upgrade due to the scoped enfield "feature".
in practice, this is a compromise that please neither side. the drop rate isn't quite high enough to completely discourage dual wielding, but still annoying enough to those who do.
and they don't have a mobile artillery without doctrine. mortar emplacement is a niche unit that's overpower in certain map but useless in others. land mattress is already getting a nerf in the preview.