My edit of the 5th draft is just over half done.
One of the things I'm looking at is to make sure that there are no references to "silver coins", or "coppers", etc. and that I'm referring to the coins by their actual names. There is an appendix in the book that explains the coinage system, among other things.
I don't think it's too much of a rough patch in the story to see the names of the coins. They're all decimal and pretty straightforward. It's pretty clear that ten aurons is a lot more than one auron, for example, and a "bit" is clearly a small amount. Nor do I think that the worth of an auron is any less clear than the worth of a "silver coin". So I really do prefer it this way. I think it adds some depth to the setting.