So the latest enhancements have finally been added to the live game.
Just refreshed to get the latest version, and the first thing I see is that my CpS multiplier, which previously matched what my spreadsheet calculated it to be, is now nearly 10% higher than what I calculate. That's after taking into account the extra achievements.
The question is, is it a mistake in the spreadsheet, or a bug in the game? There are too many variables for me to try and debug, so I shall have to wait until my next ascension, whereupon I'll check the numbers after every upgrade purchase to try and pinpoint the error.