Hi everyone!
Thank you all for your incredible patience.
I’m happy to mark this idea as ‘In Planning’ as the team is currently working on initial designs and prototypes. If anyone is interested in participating in a research call for the new mobile editing functionality for Marketing Email, feel free to send me a direct message so we can set up some time. We’d love to get your input and feedback on some of our initial prototypes.
I’ll update this thread on our progress and will be back in touch as soon as we start recruiting private beta participants.
Thank you again for supporting this idea. We’re looking forward to making mobile editing for Marketing Email a reality at long last! 
Best,
Mícheál