I wonder if it will be any equivalent steps made by Expanse?
Yes we are working on Frankomoto, there is a bounty for anyone trying to help us.
https://github.com/expanse-org/XIPs/blob/master/XIPS/xip-4.md
I though it will be just one-to-one ProgPow changed for Expanse but it looks quite interesting - so after that Ethereum and Expanse mining algorithm will be different? Won't it hurt mining availability? now it is ease to switch from ETH to Expanse; some people has Expanse mining set as failover etc.
Why did you go with a custom algo and not another existing like progpow or ubiqhash?