Audio-sync workflow without losing meta-data or project bloat?

Question

So I love the FCPX keywords and metadata system and media organization but I'm running into a bit of a problem: I don't know how to use it while also using sync-sound. At least, not without duplicating lots of footage and losing metadata.
For instance, I have a interview project with 20 clips, all with baked-in audio and high quality seperate audio. Here's the only solutions I've found.
Workflow #1
Normally I just tag and organize the 20 clips and then see what I like and what I need. I then run into a problem though, the audio isn't synced, and syncing it after organizing will create compound clips which don't keep the keywords and organization (favorite, rejected, etc) of the original video file. Also, I now have two copies of the same clip. One with two audio tracks and the original.
Workflow #2
I could of course also sync-sound everything before I even start organizing and tagging and then "reject" all the original clips so I can hide them easily and only show my synced files. The problem with this is that I might spend a lot of time syncing files that I'll never end up using.
An even bigger problem with workflow #1 is that I can't make a rough cut to see what I need and don't need without having to re-do everything. Say I edit a simple timeline and I use clip 2, clip 5 and clip 8. If I then want to sync-sound them I can, but they will lose all keywords and data, and I also have to re-edit the synced clips to the timeline. Doing this for a project with 50 or a 100 or more clips basically means you have to re-do the entire edit.
Maybe I'm missing something here, but this all seems really clunky. I don't see why FCPX can't just automatically find and add any sync-sound the clips that are already edited to the timeline.
I realise that PluralEyes does something sort of similar, but it has more problems:
-It adds workflow bloat... it's a bunch of extra steps and time you have to spend outside of FCPX not editing
-You still have to manually find the audio clips that correspond to the clips on the timeline and line them up roughly
-PluralEyes will mess up your timeline and add lots of gaps that then need to be cleaned up.
-With longer audio-files it seems to not work a lot of the time, and It'll just leave your timeline a mess and without an actual solution
Does anybody know if there's a better workflow for this? Because it all seems very convoluted and non-sensical. Our computers are really fast and audiofiles are relatively small and easy to decode and analyse. I don't understand why there's just not an option to have Final Cut scan your event's audiofiles and compare them to the clips in the timeline and then just automatically sync the sound. It could even make compound clips for all I care, as long as it automatically places them in the timeline in the same place as the original clip and keeps the keywords etc in the event browser.
Not that any of these ways are any worse than what I always used to do in the old FCP or Premiere, but still. There has to be a better way!
Please tell me I'm missing something, or doing something wrong.

Answer 1

_Freighter_, I support your statement 100%.
I need to cut a documentary shot over 10 days for which I keyworded everything. Now I need to sync audio and I face the exact same issues as you and I don't know how to get started ...