I too have observed that when using a stylus on a tablet PC, that PDF-XChange Viewer works better than PDF-XChange Editor. In particular, when I'm using a physical stylus, I'd like to disable the pencil icon that follows the cursor around. (The pencil icon doesn't bother me while using a mouse.) This difference is a pretty strong incentive to stick with the Viewer for me.
Can displaying the icon be made into a configurable property of the pencil? If so, my suggestion is to offer the following 3 options:
1.) enable the pencil cursor icon (recommended default, for users that use the mouse primarily) (looks like current PDF XChange Editor)
2.) disable the pencil cursor icon (i.e. only show cross hair cursor) (important for users that use a stylus primarily) (looks like PDF XChange Viewer)
3.) automatic mode selection. Pencil cursor shown for mouse input. Cross hair cursor for stylus input. (And maybe a larger cross hair with a finger circle for touch input.) (if implemented, this would be the best choice for a default).
I recommend those options because different users have different needs. E.g. someone did request a change to the pointer in the thread "Making the pointer easy to see":viewtopic.php?f=62&t=22460
Also I see that stylus and touchscreen integration is an ongoing project according to:viewtopic.php?f=62&t=23535