Fair enough, but at least they're not monogamous-because-reasons that don't fit the story and feel like they had to happen because of RL considerations… society's attitude, "surprise" endings to be "different", etc.
(Among other infamous examples, Negima really should have ended with "the polygamous duo" or some other combination. Not with the author's wife's expy. And I still think Hina shippers got what they deserved, with the out-of-nowhere derail of DomeKano apparently triggered by them abusing the author on her Twitter.)