Isn't there the danger that Apple just forbids/bans this remote code reloading/replacement to protect their users? I mean it's a loophole that can get abused (and likely is) for stuff that wouldn't make it through the review process in first place..
But in the scenario where apple decides to no longer allow OTA updates, you're just back to the extended review process that native apps have to go through, so I think the productivity gains make it worthwhile.
I think letting users find and select content is the only way to avoid getting banned. As soon as the app does anything to nudge users toward a particular kind of content it risks getting banned.