-The Edinburgh sub-class (Edinburgh, Belfast) is complete (with the added extra of Bel-chan) -The Southampton sub-class (Southampton, Newcastle, Sheffield, Glasgow, Birmingham) is almost complete (with only Birmingham wating for her implementation... And maybe a hypothetical maid variation for Southampton (since it's stated via ingame dialogues of both Glasgow and Southampton herself that she used to be a maid)). -And finally... the Gloucester sub-class (Gloucester, Manchester, Liverpool) is barely covered (as we only got Gloucester just now).
I'd say that we're around 60% completion wise (if we only take into consideration Town class cruisers that is).