I remember removing some plastic panels under the head, then starting at front removing a piece of heat shield before I could remove the one that needs replacing. I must have missed something. Your method sounds 100% easier than mine.
I was fortunate enough to find a used heat shield on ebay for $25. Had some scratches but not noticeable once installed.
You're right. You do have to loosen that long exhaust shield to get to the bolt and you dont have to completely remove it. Sorry about that