Opinion: Warframe fell off after Second Dream and War Within, but how can we fix this?

You shouldn't be locked out of Arbitrations by us adding new map nodes anymore. We changed that a year and a half ago with Update 32?
 

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Added a mechanism which permanently unlocks Arbitration missions one you have completed all current mission nodes. Even if we add new mission nodes in the future, you will not lose access to Arbitrations. 

Are people saying that this doesn't work?  (If you know you've unlocked Arbitrations before, and they're re-locked saying the map isn't completed, please speak up so we can investigate your account)