Thanks for your suggestion, I will let our manager knows that about whether we will create new forum area for OsmWorldMapKitLayer.
The OsmWorldMapKitLayer code is optimized after we add SQLite support, you can see include the SQLite format it get many times update, but I think current version won't be the stable one because the enhancement work is keeping forward.
If you found any zoomlevel is not so well, you can adjust the render logic for it to get better performance. If you found any zoomlevel is too heavy, please feel free to let us know. Our developer can review it.