And first off, thanks for the feedback!
Now about the coins. The trouble here comes as you say from the files that uses more resources than just the coins. So in deleting those files you sadly also looses those features. The coins are present in several files all used in different places in-game.
The files are.
widgets03.dds
window_elements_specific.dds
icon_is61.dds
It would be a possibility to create a special version just with the standard coins, but then again, a week after that someone comes along and not liking something else.
So the options are.
1. go with the complete package.
2. delete files loosing other aspects of the skin.
3. Editing the skin yourself and adding back the default coins.
That is about all i can offer i am afraid. Glad you liked the skin!
ps. A new version is in the works featuring small enhancements here and there.