I find this quite confusing, but then I am far from being an expert on the matter:

* Do we expect a high number of people applying for visa renewals and getting rejected? How come? Otherwise, when it comes to people illegally overstaying their visas, how does this policy idea address intentional non-compliance?

* Don't legal challenges to deportation of criminals have to do with the deportation rather than visas. It would be convenient if hardened criminals complied with the law and removed the need to deport them, but what would motivate them to do so?

The idea seems to be to inconvenience law-abiding visa holders without addressing major concerns, but then I probably misunderstand the concerns. For instance, maybe there is a way of creating legal busy-work when one's visa renewal application gets rejected in a way that is cheap to the individual, but costly for the state, and that this happens on a scale that makes the problem significant. Sounds surprising, and surprising that there'd be no other way to avoid that too!