Hello,
About the issues with applying fees to WooCommerce orders:
There was a problem with the on/off switch introduced in 1.2.1. This is now fixed in 1.2.3.
When fees are enabled, they are already being considered when calculating whether a cryptocurrency can be used to pay for the cart.
The fees are included in the total amount when enabled. I have not added a separate indication for the fee amount on the checkout page at this time.
Thank you for spotting this error!
kind regards