I am in the camp of inclusiveness. It is important to me, all players can find the parts of D&D that they truly love.
We are playing the same game, so conflicting desires can be an issue. But D&D is a big game and having something for everyone is mostly achievable.
At the same time, for me personally, I share the 4e ethic of consolidation and salient distinctions. In other words, if two parts of D&D are too similar, then either merge them, or make sure they are meaningfully different.
I have been complaining the Halfling is too Human, so either merge them into Human, or else make them more meaningfully different from Human.
It occurs to me, I have the same problem with the Aquatic Elf. The Aquatic Elf is way too similar to the Nixie, and similarly redundant with Mermaid, Triton, and similar. Solutions include, merge the Aquatic Elf into the Nixie, and disambiguate the Nixie from the other aquatic humanoids, thus refer to the non-elf Nixie by the nickname "aquatic elf". Or oppositely refer to the Aquatic Elf as a Nixie, similar to referring to a Dark Elf as a Drow. Make sure the Nixie Aquatic Elf differs meaningfully from Mermaid and Triton. Note, the 2e Eladrin version of the Aquatic Elf is the Noviere which is virtually a Nixie.
Anyway, it is a consistent need for the D&D game to be elegant. There needs to be a reasonable balance between lumping and splitting. As simple as possible, but not simpler.
All that said. I value inclusivity. I want D&D to meet the needs of as many players as possible.