Hi there. I have been anxiously awaiting the MySQL 5.7 release, and have been annoying people at my work about how important a release it will be. We especially have use cases where multi-source replication is critical to our workflow (and right now, we’ve hacked together a wrapper around the Percona Toolkit’s pt-table-sync to band-aid us until we can fully transition those environments to MySQL 5.7 – though we don’t necessarily like this particular situation).
I imagine that once the community MySQL 5.7 is available in GA, we’ll see some betas from Percona.