There are certainly cases of people trying it on to get compensation, but this clearly isn’t one of them - not sure why one poster is so obsessed with firing questions regarding calculation at the OP.
It doesn’t make sense to try and ascribe monetary value to each individual element of the CW product when the seat is the basis on which the rest of it is built. It’s the key point of differentiation with, say, a PE exit row - the idea for instance that you can have a decent meal in the knowledge you can relax in a flat bed afterwards. Many of the airport benefits are also of limited value to anyone who has status or priority pass.
With all that in mind, the right offer is surely something that would allow the OP to upgrade from PE to J on a future flight, whether by way of the right number of Avios or a space-available upgrade. The idea that 2500 Avios is even worth discussing is laughable.