Well, with alternate history for THMWTGG, it would be a smash if Bruce Lee had lived; his personna would have been such that he would have likely overshadowed Lazenby in scenes together; sort of when Green Hornet and Kato appear, everyone is watching Kato. Lee would likely have directed the fight scenes, too, so that would have been interesting. But aside from that, even without Lee, Lazenby would have done a good job of it, considering OHMSS. As the series progressed, he wouldn've become more seasoned and confident, hopefully kicking out 'that advisor' long before
And what if Peter Hunt had directed a few more? Bond would have been more grounded in 'reality' .... he would always remember Tracy. Maybe he would've met Marc-Ange Draco; that would've been a melodramatic scene. Draco would likely be all out for revenge, and perhaps Bond would restrain him, "a dish served cold."
FYEO with Peter Hunt could have been another OHMSS.