Zoruagible
Lover of underrated characters
In the grand scheme of things, it really doesn't matter. Talking about an early-game perspective....what are the chances that Eevee is going to be available in SM in the first place? I would say really low, considering it's considered a rare pokemon. If you really want to use it you will have to transfer it or trade it, and then you can just trade the kind of evolution you want to use on a low level.
That depends on if Eevee gets a new Eeveelution(Hoping he finally gets a Dragon one)
I can easily see it being a gift Pokemon again like it originally was, have to breed it if you want to obtain the other ones. If they don't give it a location.
But then all non-starters and events could end up available to be caught again like in gen 6, anything is possible.