What about taking away the powers of appointment that the Prime Ministers over time have gained? What about sending to jail the party whip? What about eliminating party platforms, and having the individual MPs express their personal opinions to their own constituents?
Yet you want increase the power of parties by changing the electoral system. How could you possibly think those these are bad but wish for a system that makes them worse?
Seems to me that limiting the power of parties inside a FPTP framework makes more sense.