This is really great to hear @regis ! It would get Tutor a bit better integrated with the rest of the Open edX project I think, so that’s a great step to have - hopefully one of many! 
Imho opening the Tutor project to more contributors doesn’t make you risk your leadership of the project – on the contrary.
Btw, will you apply OEP-55 to Tutor’s auxiliary repositories, or do you still see the Tutor maintainer program as separate from the Open edX maintainer program?