If the details are true, I wouldn't worry too much about the 3D models. Rough and in shadows due to being early in dev, probably don't have yet the right shaders that they want to use in UE4, etc.
Why wouldn't it count? The reality is that publishers feel that releasing a title on a single platform is not enough to sell what they want. It doesn't matter if the platforms are across generations or a mix of portable and console. The fact that they feel the need to have multiple SKUs rather than just one says it all. The fact that sales tend to be split enough to justify that choice says even more.
SaGa is absolutely going to be on other platforms in 2017. Count on it. It's a Unity game which hasn't sold 100k in Japan yet, and there's no way S-E is going to localize a Vita exclusive in today's market. So yes. It's just a matter of time. I guess that proves my point? Why do you think even tiny games like I Am Setsuna are on PC/PS4/Vita, and now coming to the Switch?
SaGa was obviously a joke due to how you're joking about it as well in the MC threads. I will honestly be surprised if it's ported to other platforms, just like I doubt it will be localized (both going hand in hand). I am Setsuna was a failure both critically and commercially, and since it was going to be localized, cheap to port elsewhere. This one is a bit of a special case, trying to cater to the nostalgia of some fans for probably cheaper than a third main Bravely game...
But yeah, fair enough for the first part. My issue with saying that cross-generation is the same as the regular definition of multiplatform, is that it's most of the time either the same or continuation of the same audience. It's not expanding it (unless you go from some tiny audience to a huge one, like GC to Wii), which isn't the case this generation yet.
We are talking about a different platform. Half of developers don't even think it will outsell the Wii U. It's viewed as a portable home console and so people are judging Switch sales based on Nintendo's home console track record, not the overly rosy 3ds portable sales. The 3ds sold like gangbusters. Nobody is predicting the Switch will sell close to 3ds numbers. It's perfectly valid to assume being Switch only could hurt its potential.
So wait, in your previous posts you implied that the 3DS didn't sell well, and now that it sold like gangbusters? Like the WiiU, if no games come to Switch (exclusive or not), of course it won't have good sales. Let's wait a bit to see if they correct/finish their message and how it does after the first month (lol wiiu first month) before saying it'll be a bigger failure than the WiiU...
The "half of developers" part is bullshit, if you're referring to GDC surveys. Most of the devs don't go there, part of them don't reply, and amongst those, they are actually not devs (but publishers higher ups).