I don’t think people really understand the implication of what they’re asking here.
I’m frustrated like the next guy by the presence of certain products on the marketplace, but what Microsoft does is simply a standard certification process that is done for all digital marketplace (including Xbox, PlayStation, Nintendo, and so forth).
What the certification process does is ensuring that products adhere with the general terms of service and don’t break the system.
Quality control is not part of that picture for very precise reasons:
1: It would require an enormous amount of human resources, and that would only grow as the sim gets bigger.
2: “quality” is a subjective thing. So how do you ensure that all developers are treated equally, and someone doesn’t get their product refused just because it was examined by someone stricter than someone else?
Ultimately, the burden of a purchasing decision lays with the customers. We have all plenty of tools to assess an addon’s quality. Reviews (and I mean longform ones, not stars on a store), videos, and so forth. People spend a lot of time and effort working on them, so take advantage of that. There’s also word of mouth. We’re in a community.
If NO information about something can be found, that should raise a red flag, and it’s definitely better to hold off until someone puts out some info.
The most Microsoft could do would be to be more open to post-relese reports and to do targeted examination (with possible removal from the marketplace) of products or developers that receive a relevant number of complaints from customers.
That’s the same PlayStation did with Cyberpunk 2077. Despite having serious quality issues, it was published as usua l on the PlayStation network because the certification process found no issues with the TOS and did not break the PlayStation network itself (nor it bricked consoles). When customers complained, then Sony examined it and removed it.
The bottomline is that many complain that Microsoft is slow at accepting new developers as partners and at publishing new add-ons on the marketplace. Adding a “quality control” on top of it (if it was even possible) would slow down the process further and would definitely not be fair to developers still in the queue.