+1 on this. I would really love to have option (if it's not the case now, and i just haven't found it) to disable/enable tile cache deletion. Personally, I would like to never delete any cached tile, until I decide to do so (really!)

Also, huge thanks for update!

// Edit

By the way, rotation to portrait via CSSU forced rotate, seems to work perfectly fine for me, without any glitches so far