I am not missing your point. Your point is you would like the Ballydoyle horses to have another go at him, with a suitable pace for them this time.
Dylan Thomas did not win the Derby, and needed the Irish Derby to prove his merit at 1m4. If a horse (FAG, for example) wins the Irish Derby well, it changes nothing. Despite the debate, there was such a clear show of superiority ... Sea the Stars was cantering while the O'Brien quartet were going hell for leather - it couldn't be more clearcut who is the better horse. This was not the case with Sir Percy and Dylan Thomas, though time clearly showed who was the better horse.
The O'Brien horses had their chance, and better opportunities to enhance the 'CV' of Sea the stars are elsewhere, again imho.
If FAG beats Masterofthehorse by 10 lengths, it means nothing. They weren't good enough on the day, and if there is to be this rematch philosophy, flat racing would go nowhere. There have been numerous fantastic rematches (Giants Causeway and Kalanisi, for example) that made sense as these were the next targets for each horse (not a lot of room for manoeuvre on their respective choices of races)) but to suggest one when is necessary when a horse has so outclassed his rivals is strange.
I think most would agree that Sea the Stars optimum trip would probably be 1m2. Of course there could be a part of his make-up which could be vulnerable if Ballydoyle attempted a version of Grundy & Bustino, and there is every reason for Ballydoyle to want STS to turn up. He has not run over 1m2 yet, has proved himself over 1m4 and the best thing for Sea the Stars would be to attempt to win a third Group 1 over a new distance, and against his elders.
If Sea the Stars wasn't trained by Oxx, he would definitely be going for the Eclipse.