If your concerns do genuinely represent concerns of many owners, not just your own, then it would be useful to have evidence of that. If you go via the NCAT route, then it won’t be just you but a sizeable number of owners seeking an order from the Tribunal.
I am in the ACT. My experience with a few ACAT matters, which may be similar to NCAT, is that the Tribunal will remind applicants that the Owners Corporation is a democracy. It might suggest that you put a motion to a general meeting to approve taking legal action to remedy various matters. If the motion passes, then the committee will be obliged to act. A resolution of a general meeting will demonstrate that your concerns are shared by a majority. IE. You might go with a group of owners to the Tribunal but even then might be sent back to get a vote. If you do it in the other order, you might not need to go to the Tribunal because the committee’s hand will be strengthened in each action endorsed by the general meeting resolution.