Ngl, I am a bit disappointed with this so far as the author was cooking with the mushoku fic. The reason the mc even ended up in ToG was his desire for adventure with mordred. He literally didn't even wish it, and the grail just took his desire and plopped him in ToG. Yet, despite it all, canon is being followed pretty closely, though there is not much that can be done there in the early floors, and, worst yet, Mordred is reduced to a useless side character. There has been no real adventure as the mc constantly uses his ToG knowledge as a crutch, and the main waifu Mordred has limited screen time and interaction cus she's a f**king sword. The story isn't bad, but it's not what the synopsis alludes to. I feel like this would've been so much better if the mc did not have knowledge of ToG at all and actually made some discoveries for himself. They are still on floor 2, so there is still a lot of potential, but I am fairly disappointed as of now. Honestly, I think this setting could've been better in danmachi, where spirits in the past literally turned into swords to aid heroes. Though I would like it if Mordred was not a sword permanently. Anyways, that's my take on the story so far. It's not bad by any means, but I am just a bit disappointed with the progression so far, which is subjective.
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LIKEPutting aside other things, Mordred is canonically about 8 years old (because she's a homunculus that grew up fast). Her character design is that of a child seeking attention, and she'd have no romantic thoughts at all. She's more like a reckless shonen boy than a girl. That's why she's a side character, the definition of the MC's platonic female friend and partner (for fighting). I don't feel like making a 'stupid tomboyish child' a romantic interest or a main character; I see people sometimes have fantasies with Mordred being the only MC in fanfics, but I don't think it would work out well long term. Anyway, I feel like my mistake was making the 'adventure' theme too strong early on, when it's just a side aspect of the story. The main purpose of a TOG transmigration is to let the MC live out his dream and fulfill his various wishes, more than he could have received just from a single Grail wish.
I'm still gonna leave the review, tho as that is the view of the ff I had prior to the author, you, explaining your decisions in writing. I read your comments to the other dude as well, and they were reasonable and fair.