Will this plugin work with MailChimp transactional?

Think I answered my own question. This from the transition FAQ’s at https://mandrill.zendesk.com/hc/en-us/articles/217467117-Mandrill-MailChimp-Transition-FAQs:

Will my current set-up continue to work?

Aside from requiring sending domains to be properly configured, these changes will not affect any integrations with Mandrill. Any existing API keys will continue to work, and our API endpoints and functionality aren’t changing. Other features such as webhooks, subaccounts, and inbound email processing also won’t require any changes.