Only Speedy, A and B would make more financial sense of Speedy certainly. But with the main issue (lack of baggage space) dealt with by more stringent security (in particular one bag only rule), why would you bother? If you're on a bus gate in- or outbound it makes a mockery of any time advantage, at airports like AMS the positioning of security pre-gate means the tardy (half the flight) end up in an huge and effective group E anyway etc.
Speedy, A and B only is not in global operation anyway - coming through AMS on Thursday there were still Speedy (just the one sucker visibly questioning what on earth he'd paid for), A, B, C and D.
(Oh, it can't be
quite two months - my last flight to the UK was 16/5 and I still have the self-printed Group C boarding pass here in my jacket pocket
)