The ultimate problem with the 5250 is that there is no way around the hardware limits of 80x24 or 132x27. If you found one, let me know.
The RPG Open Access coming in V7.1 should hopefully peel back some layers
for people (including myself) to have a lightbulb over the head moment and
realize the approach of 5250 data streams and subsequently spark ideas of
how to morph it into the "next big thing".