Man even tough I like Eiki I wanted Remilia the punh her in the face and tell her shut the fuck up. If that were happened I could say this was a nice doujin but It's just another predictable shit.
Honestly I think for the ending the author could have had Remilia ending up punished for some hundreds of years in the same way that Flandre had been enduring all this while or something along those lines. It would make the story a little more consistent with the first half.
Nonetheless the tone of the series doesn't really contain that so yeah... it was to be expected :p.