If Pakatan dismisses the current royal vizier through a show of no confidence there is a real danger of either HRH or PAS pulling the rug from under the coalition's feet by bringing about the dissolution of the DUN. OTOH without such a move Pakatan will allow him to continue his pro big business actions and policies which will turn the rakyat against Pakatan.
PAS is quite happy to leave him where he is. RPK has written about it and now Iskandar Samad has voiced his support as well.
To me the choice is bloody clear.
Amputation though painful and dangerous can save life, Pakatan's.