Something I'd like to see is a new button beside the hide/remove flag button that makes the avatar transparent while putting. It shouldn't be hard to do as it already happens when you move the aim marker to a position where the avatar covers it. This is useful but sometimes you need to aim to a place where the avatar doesn't block the aim marker but does obstruct the view of the hole.
It's not very often that I feel the need for this but it happens now and then and hiding the avatar would really help.