That opinion is just based on how the old BMO blocked non-japanese people by making it required to run the game on a japanese operating system, there was never an IP ban- and they probably won't do that with this game. They plan to bring the game to north america eventually after japan, and then europe and so forth- though there's no timeline mentioned so it could be a long time. This is still pre-beta footage, they'll get a lot of complaints for sure and fix stuff in the closed beta.

There's still only plain bomberman characters shown so far, there's supposed to be avatar customization. Some simple things that they could do to make the game better is make some of the sounds less annoying, I heard some better music in another video, make the blocks break faster, add more frames to the bomb sprite, etc. And there will of course be an option to turn stuff off like the new walking bomb which looks like it just gets in the way, there's no doubt that the game will be much better by time it's released. It's not like the old BMO didn't also have a time when it started out with barely anything, that was improved over time as well.