I tried it this morning, I guess it's for business rather than open source? The first PR I opened was slop that violated the project's policies. The new UI is missing both report and block.

There's not really any improvement to the core problem with PRs. You still have to read up and down the entire comments tab and then again the entire diff tab (hunting and clicking each "load more" and re-opening every "resolved" thread to find invisible replies) to reconstruct the timeline of what's happened in your head because nothing's in temporal order and there's still no interdiff.