Sure, but they could always roll it out and say "The code is available, but fair warning - we want to focus on getting this up and running before we start reviewing suggestions."
Really...so releasing in 3 months is not fast enough for you? If it was me, I'd want to work on it for 3 months and during that time - talk to other folks that are working on similar issues and have the code reviewed by some trusted mentors. This is pure speculation on my part but I suspect they already have that in mind...per their blog:
"...If you want to see what we are up to, we will be hanging out on the GNU Social mailing list, as well as a few other places as we work on defining some common protocols between like minded projects."
"...If you want to see what we are up to, we will be hanging out on the GNU Social mailing list, as well as a few other places as we work on defining some common protocols between like minded projects."