I understand you do not have WP yet.
When to expect?
this is an important step in the development of any project.
Since it is based on Monero/Cryptonote the whitepaper will just be an addendum that discusses how Mutex differs from Monero. Instead of focusing on marketing/WP/site etc we have been working on strengthening the network and onboarding miners. That is going well and we are starting to work on the site and more info/collateral. Right now the main differences are supply, an updated difficulty algorithm, faster block time, a tweaked emission curve and we are experimenting with block size limits. We also want to focus on accessibility, ie: making it easy for users of all levels to get started. There are a few more things we will specify in the WP/addendum but it will not be released until we are done with the site and until after bulletproofs are released and the next mining algo tweak occurs in monero.