Even giants like Nintendo have development issues. Fire Emblem was supposed to come out a year ago and the new Metroid game got scrapped and restarted. Deadlines and goals have to be met, and sometimes that means resources that could be spent on some things are instead spent on other things.

The big thing about the announcement that raises questions to me is the "we have no intention to put them in" thing. I dunno how big a patch this would require, but certainly it seems like the kind of thing that should be a project for them down the road. Maybe this will be Version 2, but that still seems kind of strange to me; I would guess this is just not a thing that's happening at all if they're saying that.