Different uniforms are for all kinds of situations. I think we should be able to equip any uniform pattern on any squad. Since different uniforms fit different tasks, or are just cosmetic.
For example:
A winter camo in moscow is good for winter maps like Fortified district, Vysokovo village. They’re good where there is plenty of snow. But when storming buildings or other dark areas they stick out a lot more than regular field gray of Germany or NKVD of soviets. So you would be able to potentially flank easier through heavily snowed areas, but inside building you will have a disadvantage.
I think this could benefit the game in a good way, showing more variety and customization.