I recently looked at this thread and have updated my folder formats to be similar to @Leo's. Nice video. Tutorial video: Column resizing & folder formats
One thing I would like to be able to change is the min width when using Auto width. Currently I find it too small and not very useful, I would rather it stay a bit wider. A min column in the Edit format dialog, or a 'global Min Auto Column Width' value in the advanced settings would both work well.
Cheers