The UK sniper needs a counter snipe ability...just like how Ost arty has a counter arty ability.
Should just give him a "Ambush" ability where for Munitions cost he can plop down in the field without cover and be camoed. With Hold fire that way you could camp the sniper Enemy at the Gates style. Or maybe even better give him a "Set up Camo" type ability (new Vet 1?) where he can camo anywhere on the field after a set-up time. At least that would make his atrocious re-cloak time sensible. Scout Cars and Kubels would still hard counter this... so it would hardly be OP IMO.
Honestly when I saw that he had a Ghillie Suit in the artwork I expected him to be able to Camo without being in Cover...