also: I recently had a PE Standard Booking EWR-FRA that was upgraded by cash weeks before the flight from E to P class.

BP showed PRESTAND, below the QR Code class was shown as C and Seat 81H on the 748. Seemingly contradictory information. Upon checkin in EWR the agent had problems to determine the baggage allowance as i had a bag over the 23 KG PE allowance. Luckily SEN status took care of this.

Fazit for me: Original booked cabin + BASE/STAND/FLEX is what is of key interest to the airline. Upgrades or Status is a second thought only... Fits into my current picture of the state LH is in.