Two months till game release and localization must be already complete. If that true, they easily can move XenoX to November 21, for example. They don't, so I suppose Nintendo again have some problems with localization.

Can and will are also different things. Why move your holiday RPG title into the same launch window as the RPG that's going to end up winning Game of the Year, especially when your RPG isn't gonna sell well as it is? It's the same principle as dropping the price; they very likely CAN, but when you're underperforming heavily already it makes no financial sense to throw away more money that could be going in the coffers. 

Keep in mind that games are often done well in advance, as is anything involving media, but the publisher won't just release it RIGHT NOW because it's done. The game already has a small fanbase that's buying it day one no matter what, but I know that if it came out any closer to Fallout 4 I'd end up leaving my Limited Edition copy sealed on my shelf because I'd still be in full Fallout mode. 

Fallout and Xenoblade are in different universes of genres, platforms and audiences.

So are CoD and Destiny but that doesn't mean Activision is gonna release them closer together. The only significant disparity between Fallout and Xenoblade is platform, and even then a large amount of Wii U owners have one of the twins too. Giving yourself more competition is never good; Nintendo releasing Star Fox in November even would've been a mistake because they're still competition with Fallout. You don't compete with ES or Fallout, period, without taking a hit, and unless you have a guaranteed hit you don't even try to do so. 

I mean this next part: If you seriously, genuinely think it's a good idea to push Xenoblade's release date up so that it is MORE crowded instead of a relatively docile December lineup, then I have all the info that I need to respectfully dismiss what you have to say here. The game will already perform fairly poorly as it is, coming from somebody who is looking forward to it very, very much; moreover it's the kind of game that relies on long term sales if anything, because it's never gonna make a huge splash at launch. We're just lucky Persona got delayed, otherwise Xenoblade would've ended up completely screwed and then genuinely should've been delayed. 

Zelda and Starfox delayed to 2016.... So WTF does Nintendo even have for Xmas?? WiiU gonna bomb even further the way things going.

XCX was already delayed once so we should be good there, maybe...