If Parliament did decide to retain some supervisory role over the relationship between the Governor in Council and an office-holder, my personal opinion is that it would be preferable to do so through legislation that has blanket application rather than a piecemeal approach.
The reason I say that is in part because as I understand it, the Federal Accountability Act provides a process for Parliament to play a role, or at least there is a consultative mechanism on the appointment side of things. So it may be sensible to establish a corollary in terms of the removal process. I think a piecemeal approach would be haphazard and potentially irrational and very difficult to monitor and implement.