Yes, it can take a long time. To speed up the process you can delete files as I outlined above. We are looking into to why this Processing is taking so long and causing problems this time.
My launcher hung on the processing stage so I deleted the Mesh.xsip file and restarted it. It took a long time (about 1 hour) but it did finally finish after deleting just the first file on your list.
I hope that my report is helpful in figuring out the snags. I think the patch process needs some refinement before the game is released. Keep up the good work.