Everyone is reset to Rank 2, and 10 power... click on your profile & it will still show the highest rank you ever achieved... to get Rank 3 you only need to do basic tasks, including "activity in the portal". Bungie is force-teaching us how to use the portal cuz it will be the main hub where everything is launched from now. No more searching thru planets to look for an activity. Log in, look at portal, begin the grind.

It's intended. You probably just didn't read where they said they'd do it.