LMG Obers only have one automatic weapon, which can be dropped and stolen.Atleast 50% of their overall DPS relies on the MG34, so they're not as bad as Fallshirms with an entire squad of non droppable FG42s that are not hindered as much by any squadmate dying.
55.7% at far range yes. Losing about 15% max dps per man but far more durable a squad. Falls are about as tough as infantry sections meanwhile (maybe even less depending) and lose 25% of their DPS per man.
3 Fallshirms in a single army is just target practice late game for tanks and artillery.
UKF elite infantry are practically given stock with the Infantry Section. In 3v3+ upgrading them should be no issue. Double Bren IS will beat Falls in a shootout vet for vet.
I'd address other points but I think others will have other things to say.