ddinchev Thanks for your post. We're always working to improve our processes and transparency. That's the entire point of this dev blog series, too, and we're grateful for how well it's been received.
As for defining specific issues and milestones, you can see our current Beta 10 milestone here. Some of these issues relate directly to the cited roadmap questions, such as finishing the extender API (#1624, #1781, #1467, #1641), upgrading the frontend framework (#1589) and improving performance (#1764, #1578). These include our concrete goals at the moment towards the broader goals you see defined for 0.1 stable.
Once Beta 10 is nearing completion or released, we will be defining more concrete issues and a milestone as you've seen above. Anyone looking to contribute should take a look at the milestone issues, and comment there or chat in #internals on Discord if you have questions. We happily welcome external contributors and we'll do what we can to help someone understand the approach needed to resolve these issues.
Understand that with our recent changes in staff, we're in something of a transition. We're taking advantage of this to try a different development approach and more transparency, and I hope you can exercise some patience while we get there.
