Hi Tim,
Thanks for your nice words. The replay feature is indeed particularly beneficial for Cartographers.
Regarding the ratings, we thought we had fixed this but it does not look like it. Did you observe the issue lately?
Regarding the replay itself, the behaviour is intended. In a live game, you can select the pieces even if you are not looking at your own map (then the map switches to yours). So unless I am mistaken, you only see your option. I don't think it is a big problem as the original shapes are always visible. Sure enough it can be confusing sometimes but I think you can figure it out (and you did) when this happens.
Finally, I'd like to add a word on the replay feature. It was programmed in such a way that we have nothing extra to program once the game is developed. The archiving of the moves is automatic and the replay should work out of the box. But that does not mean it will always work exactly as you would like it to work. Some games will have specificities (like HexRoller that allows undos) that will make the replay sub-optimal. I don't think this will happen often, but keep this in mind. The replay feature may have a few glitches that we would correct if it was the main feature of the game. In a way, the same applies to the screenshot feature which can have a few glitches here and there depending on your browser, your computer, the game itself.
This said, if you see something wrong in a replay, please let us know! We'll do our best to fix it anyway.
Nicolas.