Regarding the mouse-clicking, I honestly didn't notice that it wasn't using an actual mouse-position.
It does occur to me now that using left-click for "action" would potentially conflict with the dragging of the view; perhaps the distinction between the two could be a combination of time between mouse-down and mouse-up and the distance between the mouse-down position and mouse-up position. Still, there is the potential for that to result in the game misinterpreting the player's intent on occasions, which may be frustrating...
Anyway, I'm glad if my feedback has been of service. ^_^