Matthew Miller, the new Fedora Project Leader, wrote that there's currently no delay from the target 14 October release date -- at least right now with regard to the most recent situation. Basically, FESCo is letting them land some work related to the Fedora Server Working Group's activities late in the Fedora 21 Alpha schedule to avoid delaying the overall release.
Matthew wrote, "the Fedora Server Working Group is writing new code which will provide a programmatic interface (an API) for provisioning servers with certain Server Roles. This doesn’t compete with existing config management tools like Puppet, Chef, or Ansible — it provides a framework that they (or the new Cockpit web GUI) can talk to. That’s taking a little bit longer than planned, especially because new input from the CentOS Simple Linux Server SIG was incorporated. However, at last week’s meeting, FESCo (the Fedora Engineering Steering Committee, which manages the overall schedule) decided to allow just this Server Role Deployment Framework to land a little late in the Fedora Alpha schedule, but with no delay to the rest of the project or change to the overall F21 schedule."
Overall, Fedora 21 is shaping up to be very exciting and should be released in October if no delays occur, which up to now at least has been a fairly regular occurrence with Fedora Linux releases. There's many new features to Fedora 21 as have already been covered in countless F21 Phoronix articles.