I suspect quite a lot of the “reportable bugs” might actually be well-known issues that result in trade-offs around performance, ease of use and accuracy.
It might make sense to mention things in a forum thread here or elsewhere before logging bugs for them, to avoid things caused by the same issue being logged multiple times.
With regard to the Shortbread Schema, it’s a great proof of concept but I suspect that OSMers will want more in it for a “standard map on osm.org”, so some of those conversations might be interesting.
The “easy bit” is actually iterating on the map styles - and there’s benefit of doing that even for the shortbread-based one (I believe that cuisine is in the tiles, but not shown, for example).