Seeing this thread has really quelled a lot of fears and questions I had about the merge, when my time comes. You are the real MVP for this, and are doing a great job keeping it updated. I'm gonna bookmark this so I can check back if there is anymore info. Thanks a lot for helping us all out!
For reference, I have a PC acct that is MR15, Switch that is MR6 and PSN that I barely started which is MR0. I'm gonna for sure merge the PSN and Switch accts into the PC one.