The guys over at Elephone have ported flyme 4.5.4 (based on android 5.1.1) to the P7000 there are a few bugs that are still to be ironed out, but the fact they are supporting the phone even though they are working on new models should go some way towards silencing the doubters.
The rom can be downloaded and flashed via pc or using the Ele flash app (this requires root)
P7000 Flyme rom download
Ele Flash App
Please leave comments and questions below