There is a portrait keyboard, it just isn't the same one as comes programmed by default. There's also both commands and packaged widgets (I think) earlier in this thread for switching between one keyboard and the other.

The main point right now is this vkb isn't even that finished yet. As you could've noticed from the screen shot, if this stuff gets finished/updated any time soon, we will have a damn workable keyboard for both portrait and landscape.