Quoting from "Looking Ahead: Evernote’s Priorities for 2019" by CEO Ian Small
The above quote from the CEO Ian Small, about loyalty and the goal of honesty act as a springboard for this feature request.
A public roadmap offers a way to build trust with the Evernote user base. It provides users with the ability to see which feature requests are being worked on and it's an asset that can be touched on in the inside Evernote videos. It's part of opening the kimono, to regain lost trust by loyal users.
Many companies use Trello, Asana, and other kanban-based planning tools to manage projects among local and remote workers. In other words, I'm confident that Evernote uses Jira or something similar, that has roadmap data that can be added to a publicly viewable asset. Making some part available to the public is low hanging fruit.