As noted elsewhere I would appreciate a Polaris Lounge at FRA as well, given the large and ever expanding number of flights now operating into/out of there, despite the LH lounges which often are very crowded and offer a soft product a step (SEN lounge) or two (business lounge) below the best PLs have to offer.
Further, it is a real challenge to find any UA support/agent at FRA gate & lounge-side. This was never an issue, at the time of the UC and IFL in FRA.