Heyo everybody. I actually went through the whole erase and restore process before Apple released that document (I had a ton of phone calls with Apple Support and this was what they finally recommended) and while it was a huge PITA, it actually did fix everything for me. Of course I happened to do everything at the precise timeframe when there were iCloud outages, so it took two hours to finally get my watch re-paired.
Phone isn't overheating anymore, Health takes up less storage, GPS routes are restored on pre-iOS 14 workouts, Health app and Fitness app data match up perfectly again, resting calories are back to normal, no more dropped HR readings, etc. I didn't lose any achievements, awards, or past Fitness data. Health data logged after iOS 14 is still screwy and doesn't match up with Fitness or Watch data, but everything after the restore point is totally fine.
It's a totally ridiculous solution and I'm pissed that this is what it came down to. Thankfully I have enough iCloud storage and didn't lose anything in the switch.
Like a bunch of other users have noted, it is CRAZY that all the data sources from each "watch" aren't synced up into one. I un-paired and re-paired my watch at least 5 times before they recommended restoring my phone so my data sources are an effing mess. Not ideal for a control freak like me.
Can anyone that's tried this verify that their asinine solution restores three year old GPS data wiped out by iOS 14? I don't fancy restoring my iPhone if it doesn't fully fix the issue.
All of my pre-iOS 14 GPS routes are back. Everything recorded post-iOS 14/pre-restore only has the start point. Haven't done any walking/running/hiking workouts since restoring so I can't speak to that but I'll try one out later and see what's up.
My personal concern is that this IS Apple's official fix.
I spoke with four separate people on Apple Health's support team over the course of the week and so far, this IS their official fix. Last guy I talked to admitted they don't know WTF is going on and this is the only thing they've found that helps.
Yes, I lost my medals. It's also thrown my averages out of whack, which means my October challenge is now to complete my move ring 'more than 23 times to beat my average' – last month I actually got 29/30.
The Activity app on my iPhone has been stuck on 'Restoring Activity data from iCloud' for over an hour now even after a couple of restarts, but I'm not hopeful it's going to restore the missing data.
Edit: It appears I'm also missing all of my workouts. The Health app also says 'Downloading Health Data…' so hopefully it's a matter of time before these all come back.
Update: My old workouts have reappeared, guess I'm going to have to live with the 11-day gap.
This happened to me at first too and I freaked out, but everything came back within 12-ish hours. Took forever to get all the data downloaded.