Congrats on the great job! V5 is awesome. It has becoming my go to drawing program. My hardware are Cintiq 22HD, Galaxy Pro 12, Samsung Series 7 Slate. As much as I love Cintiq, but I aslo like to draw while kicking back on a couch with a tablet. Series 7 slate (shown below) resolution is pretty low, the size of UI and docks are eating up the screen real estates. I would love to see a tablet mode with smaller UI, kind of like workbench mode in V4 and all inputs can be done with sliders. So keyboard isn't essential in the tablet mode.
I know brush size can be changed by dragging on the percentage, but it can't pass 100% which is needed for 300dpi drawing. It would be nice to have a slider that would allow pass 100% mark.
Artrage 5 can overtake Sketchbook Pro, IMO. It would be nice to have the gallery function in Android Artrage in V5. Keep up the good works!