We've got enough Unicorn mounts now SE, thanks.

[MurakumoMillennium]

Okay, so two different types of Unicorn mounts was unique and with enough variety that they would be special and stand out from other mounts.

Then 2.2 came out and we get four more, color-coded to match the rainbow??

There are only 2 unicorns in the game, and they did not add more with 2.2