Given the Epic settlement means Google is allowing alternate app stores, and also the delay only applies for unregistered developers, I'm not certain it won't actually get easier to get folk set up on F-Droid.
It still remains to be seen what the actual requirements are, and even if F-Droid could become "approved" that doesn't mean they want to. Time will tell.
Why the hell should we "mother may I" with Google for running apps on our own phones if it isn't sourced from the Play Store?
The "security" rationale is horseshit given just how much malware is readily download able on the Play Store. Google never cleans its own house before going after others.
"only applies for unregistered developers" but remember the whole point is to allow Google to pull your "registered developer" status on a whim. Something they've shown over and over again they cannot be trusted with