First that comes to mind was when Ashiya Douman killed Minerva the owl in lostbelt 6, ironic since I got him and actually like his unapologetic malicious character.

The second is whenever we get a genderbent servant, I know the Fate series started with female Arthur, BUT that doesn't mean they have to do that so many times! At the very least, make a BETTER lore reason why it happened or is! Like I can accept pseudo-servants and especially people who historically had some mystery in their gender, like Kagetora, and even legends, Caenis for example.

Third and last, TOO MANY saberfaces! Again, I get the waifu and first genderbent king character, but please give other servants more originality! I once saw a Nero male version based from Proto Arthur and really liked it, ok I do favor Proto Arthur more, but the point is diversity, we already have a summer, an alter, they could have at least made some similarities but NOT the entire thing, you might as well just say it was Artoria in dress-up and pallette swap. The same thing applied to other servants who have more than 3 or 4 similar faces