As I understand it, the half screen keyboard poses many problems and the final product may not be the total solution you are waiting for.
Those of us who use fleksy understand typing in a text field makes VoiceOver have delays and stuttering speech, which is very annoying. So, the current thought is there will be a half screen keyboard useful to interact with the various areas of the screen, but you will want to change to the full screen keyboard to enter the bulk of your text. This seems to be the best compromise that Kosta can implement.
There has been a Couple of attempts released to the alpha group which didn't perform as expected. Kosta is a steely eyed app developer, so whatever he finally releases will be the very best app possible.
I was one of the big supporters of the half screen keyboard, at first, but since I have been using the current version of FlickType I really have no problems switching between the full screen FlickType keyboard and the iOS keyboard.
In my opinion the half screen keyboard will be nice., But not necessary.
I personally can't wait until the half size keyboard is available. This would hopefully work more like the standard keyboard in that one could easily view one's text entry, navigate the cursor for editing and making corrections, etc. As noted on this forum, there are several circumstances where dismissing the keyboard leads to a result in which the user must go back to the standard keyboard. I'm thinking of the situation of trying to use auto-correct when sending e-mail or text messages.
This will be a welcome addition and obviate the need for switching keyboards.