Descent: Underground Next Year?

Descent: Underground is currently in early access on Steam, offering an early crack at this 6DoF shooter revival. This beta version became available there over a year ago, so Swiss site contacted the developers at Descendent Studios to ask when early access would give way to a full release. Their question was in German, but the answer is English, and they offer a vague timeline that indicates this will come some time after March of next year:
Our current plan is to complete development of our single-player campaign around March of 2017 and to release out of Early Access shortly thereafter. We are a small, independent team, so of course that timeline is subject to change.