What would delaying it do? No matter when they release it its going to rekindle the issue, considering there are many people who probably don't really understand that they can't import many of their Pokemon into the games.I was expecting a January or February launch, but it's possible that the shitstorm caused them to delay it. Who knows.
All I know is that May or June is the start of the next hype cycle, so it'll have to release before then.
I'm also of the opinion that if it was anything substantial that would stop the backlash they would have announced more details already. All they've really said concerning it is "Use Home and hope the Pokemon you like are in future games! We hope you keep buying them anyway!"