You realise that this is something completely different than what you wanted to imply are you? Up until they introduced the PIN, they've been defending the phone number. Just because someone had a issue on github, doesn't mean they've been working on it...
You think I’m knocking the app. I’m not, I think it is the best option available. I just feel that as long as the phone number was required, they could have been clearer to ordinary users about the threats that Signal aimed to protect users from: advertisers and ordinary criminals, sure, but not necessarily the state authorities, and so it might not be suitable for dissidents for the time being.
One is some guy posting someone in the issue tracker where 1000s of other ideas are. The other is "them working on it".
Moxie is one of the best security researchers in the business, he was definitely aware of this before anyone ever brought it up on GitHub. Was it really so hard for the Signal devs to acknowledge this downside on the blog?
[0] https://github.com/signalapp/Signal-Android/issues/1085