I am fine with them keeping some things secret, if they wish to. But there are many great new UE5.1 features we are already aware of, because many people have built the engine from source.
- Nanite support for masked materials
- Sorted translucency
- High quality lumen reflections on translucent materials
- Material editor nodes parameters can be edited directly on nodes
etc…
It would be nice to see them on some roadmap. What’s most frustrating about this is that we had a functioning roadmap when it was back on trello. We already had a roadmap which showed both the future and the past. Now we have a roadmap that shows just the past. It’s a downgrade.
The downgrading of things has been a recurring theme for website part of Epic. The engine has been consistently doing a great job past few years, but the website(s) team seems to be doing quite the opposite in recent years. Some time ago, we had a great, simple, uncluttered, discourse based forum. Now we have visually noisy, confusing, and feature lacking gimped version of the discourse forum. Ever since the migration to this new bloated forum/learning hub, I am visiting the forum much less because it’s just too noisy to find the relevant information 
But that’s a topic for another thread. I feel your pain, but I’d like to keep this one mainly about the roadmap.