While I understand not wanting to make too many Pokémon "human-like" or giving "genders" to them based on looks, I actually appreaciate the variety. Like, when I look at fanmade evolutions I feel like they all are designed to appeal to the same people, all being "cool/badass" instead of portraying a different group of qualities that could be represented in an evolution.
Stuff like this feels like it tries too hard to be cool only.
I felt glad Popplio evolved to Primarina and liked it way more than any fan evolution.
I think being neutral is good too, but when I look at the final evo for the three gen 1 Pokémon I feel like they're all too samey. All evolve and just look bigger and bulky and meh, it's boring.