That's quite weird implication.
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Meanwhile I have read the LB6 and Nasu went all out to make it awful.
Flanderised shipping with Castoria and Muramasa for no reason (anyone remember Fate route, where Shirou actually gets to know Saber before she falls for him, and that she is just his friend in UBW route and "Archer route"? It doesn't important, the second Castoria and Muramasa are in the same screen, they are being shipped).
Old Nasu would make LB6 and Guda and Castoria and don't even use Muramasa, but instead you're forced to see on the weird ship, which makes you just feel bad comparing to Muramasa.
No wonder even one of the most neutral FGO sites continue to post critic about it and
made a full critic article about it (use Google Translate).
Now I fear he would do the same with Morgan in Bond 5 and go "lmao actually I prefer that Beryl dude haha". His fetishes are out of hand, and I just want a cute master x servant story, but it feels it now limited to Crypters (see Caenis and Kirschtaria's story in LB5.1 and 5.2, which easily tops everything about Chaldea ever being made).