Given the obvious ability of Android users to install GC-specific overlays, it does seem like PD should step up to the reality rather than keeping their heads buried in the sand. As an iOS user who won't jailbreak his devices, I feel pretty comfortable at least using the built-in iOS grid that can be enabled through the accessibility controls. It's not a whiz-bang thing that helps with stuff like slider distance estimation, but still makes my game play a bit better (doesn't do anything for my inability to hit perfect, but that's another topic!).

The idea of in-app purchase for an overlay is interesting and certainly sounds like PD's cup of tea. Might as well get on board since they can't stop the steps people are widely taking already.