So...
Osteer grens need to be 5man as stock, maybe with an upgrade like the brits, maybe even at a slight cost increase initially. But 4 man squads just doesnt hold up to the allies average of 5-6 (with 2 heavy weapons per unit). And thats before we take into account the squad wipe capacity of a allied mortar/artillery.
Clearly the best solution is to make them a mirror of cons with 6 men. Obviously add teching for grenade and faust and remove Mg42. Otherwise good to go.