Flame Tree, your suggestion that
Perhaps the speediest way to improve things, and to prove you have tried to right the ship should it come to adjudication further down the track, is to put a motion to your committee to vote on regarding this concern
is good in theory.
I was involved in one strata where the strata committee declined to list my R&M motion, presumably so they would never have to deal with it.
At the very least, limoncello should email the strata committee (say the chair and secretary) and CC to the agent. If they continue to ignore the matter, email again and after you email, immediately online apply for mediation.
May I suggest that you pony up to mediation as a good citizen and have with you at least one quote that you obtained for the work. If the OC does not attend mediation or does not come to a agreement with you, the mediator will indicate your right to proceed to NCAT. Which you should.