Something i want to ask, why do people believe that if Sylveon is Normal, it would be the Final eveelution ?
That doesn't make sense to me. Eevee evolves in accordance with it's surrounding. I presume, the Normal type evolution will be a result of eevee adapting in a city. Since there is nothing to alter it's DNA, it just evolves like other pokemons.
How does that stop from being more eevelutions ? Lets just say, There is a NuclearPower Plant somewhere in the Pokeworld and the Radioactive wastes can alter Eeves DNA to turn it into a Poison type. Besides, in Pokeworld all Eevelutions already exist. It's not like Glaceon or Umbreon were 'discovered' after Vaporeon and group. Thus, the order by which they are revealed in the games means little to nothing.