While I do support the idea of an appointment-based cabinet, my primary issue is letting new people a chance into an entry-level cabinet position like Minister of Culture or Engagement that lets them prove their worth to TSP. Personal experience tells me that the same 9 or 10 people will end up in the cabinet over and over again and new people won't have a chance to prove themselves. Working in a ministry consistently won't work with a fluid cabinet that changes every term, so they won't be able to show their dedication to a single ministry. And even then, I find it seriously unlikely that a new Prime Minister would look closely at the activity of all the previous ministries from the old cabinet to discover this new person.

But, yeah, I do generally like the idea of an appointment-based cabinet, it just has some flaws that need to be worked out before I believe it could really be put into practice.