This may be the intention right now for the current minister, but these provisions give power to any minister in the immigration system. For example, maybe one minister might think that selection based on nationality—this is what they do in the States—is something that they want to do.
There is an endless variety of selection. The issue is that right now the minister is subject to parliamentary oversight when they want to make changes to the selection criteria. With these provisions, there will be no parliamentary oversight.