"Customers traveling in United Polaris first class should go to Terminal 3, Door 4 on the departures level to access the United Global Services Reception lobby. Effective December 1, 2016, Premier® members will be able to access the Premier check-in area at Terminal 3, near Doors 3 and 4. "
Interesting, I am 1K and just flew to Polaris to EWR. I didn't know I could access the GS reception lobby with Polaris service? I thought that was reserved strictly for GS customers? I did my usual checked in just south of GS lobby at the Premier check in which at the time was no problem at all.
And yes Premier check-in was moved from the north end of Term 3 to the south end, its current location.