I'm far more concerned about community development of libraries, IDE support, and the beginner experience (especially on Windows) than I am about changes to the language, which is already pretty good. As a Linux user working on top of C libraries, the experience is incredible. That's not the case for everyone.
Then there are problems for users of the language not having enough libraries and a sub-par IDE experience (again, true or not). Go and Rust built communities of programmers that aggressively used the language and made their work available to others. I don't see any reason we couldn't have more of that with the language as it currently stands. Adam certainly had no trouble knocking out hundreds of thousands of lines of nice libraries. Edit: And Ilya doing all his good work with Mir.
The first is a long-term problem. We'll see the effects ten years from now. The second makes it hard to have a reason to use the language right now (largely for anyone that doesn't want to write scripts or interact with C libraries). That's most of what concerns me.
What changes would you like to see happen?
That being said, never assume that no response from someone means someone doesn't care. I felt awful when dealing with situations like this. If this were my project, I would probably be extremely frustrated and more than a little bummed, whether or not I thought the fork was understandable.
Those are not things that are constructive to air in public, though, and I think it is a mark of leadership that Walter's dialogue remains as calm and polite through all of that thread as he usually is.
Contrariwise, I read through that forum thread and some of the linked github issues, and it wouldn't be shocking if he were happy to see some of those people walk away. It would not be politic for him to say so.