There slight possibility if they use the parliamentary route - that BBI could make it with 2022 (IEBC logistics nightmare) - otherwise popular one is irredeemably flawed.
The problem high court has completely ruled out amending the executive chapter - so no PM or DPM or such hybrid nonsense.
The core operating system will remain a pure presidential system until we are due for an upgrade - you need a civil war for that.
BBI is 2022-combo. Even if the activist judges didn't decapitate it - Ndiis would have run to CoA then SCORK. The temporary orders against IEBC and PORK will stay in place during the appeals.