I would not expect the MP CNC to be capable of printing as fast as a dedicated 3d printer. The X, Y, Z axis are orders of magnitude heavier than most printers.
The fact that the MP CNC has been designed around being an “All in One” means it will never rival a dedicated 3d printer in terms of speed (though from what I have seen it rivals expensive printers in terms of accuracy and print quality)
Comprising speed for flexibility and and the ability to mill is more than a fair trade off in my books. It is an impressive design, and fills my needs exactly.
If you require speed for productivity reasons, I would look at either using the MP CNC to help build a dedicated 3d printer using a 3drag or reprap open source design. Or look at upgrading to multiple heads on your MP CNC.