The PL has Mayfair suites that are two small rooms somewhat awkwardly connected on the rear facing side of the building. Honestly not that desirable. That is the only free suite upgrade I have received in 15-20 stays. This property is famous for co-pays for better suite upgrades.

I wouldnt read too much into a lesser upgrade at a morning check in, you could have chose to wait. Just because a room is available for sale that evening doesn't mean it was ready when you arrived at 9 am.

I am back here next month and "chuffed"