Well look on the bright side, this also means easy Drought Vulpix/Ninetales, Drizzle Politoed, Magic Guard Abra/Kadabra/Alakazam, Regenerator Slowpoke/Slowbro/Slowking, Cloud Nine Lickitung/Lickilicky, Moxie Gyarados, Imposter Ditto, Hydration Vaporeon, Magic Bounce Espeon, Pixilate Sylveon, and Multiscale Dragonite. :)
As for the mechanics behind the transfer, I'd say it makes sense for the most part. Particularly Nature is a clever idea, it's something easily manipulated so with effort, time, and luck you can get the Nature you want. Shiny though is a bit odd, why not just make it random? Do they want it to be manipulatable? Would kind of devalue Gen I Shinies.