Speaking only on the third part, it is currently set up as intended. The pool of justices is not an actual position that you can be confirmed for, 95% of the time none of them will ever do anything and a member of it can be on the list for years and do nothing with it. The point of the pool is to be a list of candidates nominated by the government to replace the Permanent Justice in special circumstances. There's no point in making a vote to confirm someone to a non-position, and the proposed vote only adds politicization to what is supposed to be an apolitical system.