Whether its newer info or not is not relevant. If newer players joined in then they only got a few new Eevee Evolutions depending on when they started seeing as the Physical/Special move split happens in Gen 4 when they introduced Glaceon and Leafeon only. So really they started with 2 Pokemon that has very little relevance to them always being Mono just as them always being Special typed has no relevance since they were special typed in Gen 3 right before Gen 4. Its only been 2 generations since that split, so Special typed pattern is still valid seeing as majority of them were introduced before the split.
You're acting as if the previous eeveelutions were somehow thrown into the shadows when Leafeon and Glaceon hit the scene when they're still the same, in regards to mono-typing. Yes the physical/special split wasn't that long ago but the fact that they
were split can also be used to argue against that having meaning when it comes to Sylveon.
Now can it be used as a reasoning? Sure, since it was more of a behind-the-scenes type thing and it makes sense to those who have noticed it. However, I personally am not buying it because of the split and for various other reasons, a big one being that it just doesn't scream dragon to me at all nor does it look like it could have any kind of story behind it leading to it being dragon-typed.
You said specifically that them introducing a Non-Special type Eevee Evolution was more possible than them introducing a Dual typed Eevee Evolution. Yes you are arguing against the chances of Eevee's evolution changing. How noticeable it is doesn't change how relevant it is.
And yes how similar the arguments are is the point. Its the exact same argument with interchangeable words.
Seems you have missed some things I've said or you'd realize I meant, and said, that it would be more passable to ruin the physical/special concept than it would be to ruin the much more obvious mono-typing concept, for reasons I stated before.
I brought up the points I did to show why I disagreed with what Pinkie had talked on about, not that it's something that is completely shattered. Below, in bold, is the reason I went on why I did about mono-typing:
Despite the Physical/Special split in Gen IV, Eevee still managed to received two new evolutions that were formerly special-based, Grass and Ice, which means game mechanic changes have no effect on patterns/traditions, which are important models on what to expect on the next game to prevent gamers from being overhyped on things that'll never happen due to patterns/traditions.
Now where is the importance behind something hidden like that(and would have pretty much no consequences if 'broken') and how can it really be considered in the leagues of tradition(since that was brought up to defend it)? If we get a physical-type, ok...we'll just get them all one way or another eventually, nothing really bothersome there; the split makes this more debatable anyways(since it's former status has indeed been broken). Mono-typing, so far, has yet to have any kind of break to it and is looking to have a pretty high chance of staying that way and going on to represent the whole idea behind eevee and it's evolutions. In other words, it so far has more importance to the line than whether or not a
former special or physical-typing comes next.
It isn't 100%, though I believe it is, because we're only halfway through all types, but anyone, whether they started with Red or just joined in with Black 2, can look at the eeveelution line and have a much, much better chance at noticing 'monotype' than they would 'they all are past special-types so far'(especially if they haven't played any previous games and, even then, it's not as noticeable). Both arguments are there, hidden or not, but the former would have a bigger impact were it to be broken than the latter. That's what I was getting at; I wasn't completely trying to destroy the latter concept.
I'm not even sure why this escalated to where it is.