I would also appreciate a County Class Cruiser "in game" even if it was a standalone premium.
Do it straight, smoke and repair. They didn't have much armour anyway.
Premium, if you like with a with choice of Ammunition.
If nothing else as a premium, it would give the RN a cruiser to train Captains on. Since Belfast is pulled there is nothing for newer players to train RN Cruiser captains with unlike I believe every other 'nation'.
Please keep Radar away from it, even if they are famous for the use of Radar. In ere every RN WWII battle there seems to be a County Class using Radar.