I hate the A and B-spec division tbh, just unecessary fake doubling of events. It should be like GT4 (and GT6) that A-spec and B-spec are optional. And GT5/GT6 is truly worse, as someone who has deep dived into both, like they have significantly less events than GT4, that it made for too much grinding. And for GTS, it's obvious, they only shoehorn the offline mode in the middle of its run, a blatant hasty attempt. No championships at all, no prize cars, etc.