with up to 42 new Flight III ships in the class being planned - the first 3 have already been launched.
No they haven't. In fact, not even contracted for yet IIRC. The ones you're thinking of are Flt IIA+ (!) and the very fact they're having to do this indicates a major problem in their ship design capabilities. Some of the things they're having to do to make the planned Flt III ships pass stability certs without a complete redesign of the hull are "interesting" to say the least.....