After reading
https://ripple.com/dev-blog/curves-with-a-twist/ I wonder if something like this is also on the mid-term agenda for Bitcoin, since especially the issue with ECDSA (weak RNGs on Android) even already has affected its users.
Yes, I know, I know, for some people Ripple is a red flag - please don't discuss this here though, please focus on the better performance + security aspects of using Ed25519 signatures instead of ECDSA.