For a time, if you convinced NCAT that your strata manager was incompetent, they would appoint a compulsory manager to take over all the functions of the committee (bit of an over-reaction, methinks).
However, we recently reported a case where the strata committee got rid of the strata manager and had them replaced by a compulsory manager whose role was restricted to only the normal functions of a strata manager.
On the other hand, we have recently seen a strata manager who was removed by three strata schemes, then appointed as a compulsory manager to a fourth scheme.
The tribunal is unlikely to remove your strata manager and leave you find someone else. Go to the tribunal with a strata manager who is happy to take over only in that limited role and you have a better chance of success (depending on which Member you get).