It is interesting to note that the very qualified folks who made stock-rooted-odexed FRG22 available to the Droid community did so after testing it for a number of days. Like the local DF thread's odexed 76.9 MB version of FRG01B, this stock-rooted-odexed version of FRG22 at 74.7MB is also a complete install with all the files, but it doesn't appear to have the scripts to update all the way from 2.0.
There is online documentation of experiences of at least one person coming into a VZW store with a Droid problem and having the non-rooted version of FRG22 installed by the store manager, so I would guess that it might be available and trusted in that current form.
Whether that "Manager's distribution of FRG22" is a final form, or whether it is functionally different from the rooted FRG22 that was released a few days ago is yet to be seen... But after having done bitwise-comparisons of many of the files in the large FRG01B and FRG22 builds, other than having SuperUser installed and the signature changed to protect the leak source, there are very few visible differences (other than the scripts). Because the Droid running-memory footprint of FRG22 is larger than FRG01B, there is speculation that FRG22 has tuning at a system level, possibly related to buffering that would improve Flash functionality.
None of us knows what is lurking in the minds of the Big 3 related to the official final Froyo OTA release. All I can tell you is that on my Droid, I ran stock-rooted-odexed FRG01B with the Flash beta when this build came out and it was very reliable. And I've been running stock-rooted-odexed FRG22 also with the Flash beta since this build came out, and it has actually been a little smoother and faster, slightly improved battery life and heat, and very reliable. I've had no issues with FRG22, and after having been running lots of ROMs, I'm pretty critical of how my Droid runs. I've had no reasons to look anywhere else after FRG22.
We're all going to have to wait to see how close this stock-rooted-odexed FRG22 is to the release that is actually sent out in the OTA. The OTA may be a different build number, or it may be FRG22. As has been seen with FRG01B, there is no guarantee that the build number identifies a fixed set of files, features or functionalities.
Just my .02...