I think that this is a magnificent lens for anyone that is still into Olympus bodies and has $7.5K to drop on the lens (which means probably not too many people). It's a shame that all that optical quality has to end up on old technology M43 sensors and EM1... bodies.
Another interesting thing they claim (yet again): They do the 2x multiply to show their equivalent FF focal distance (ok, that's fair and accurate). They also do the 2x multiply to show their equivalent FF max. magnification, although they word it deceptively (It looks like their actual magnification is shown in parenthesis, and they use 2x to get the equivalent FF magnification, which is also ok IMHO). *BUT* they still show *only the M43 f#* which they apply to both the M43 focal distance and the FF equivalent distance (they're still doing their marketing bullshit to falsely hype their lens as having an equivalent f# half the value it really is, instead of also showing the 2x on the equivalent FF f#'s which would be fair and accurate).
Keep in mind that Canon could also claim an additional set of values (focal distance, f#, max magnification) if a 1.6x or so crop was applied to their FF sensors and so they could come up with additional bigger claims for focal distance and max magnification that way. But who needs to fight a marketing war with a company that's already out of business?
If I was still into Olympus (which I'm not as all my stuff is now in my brother's hands) and had $7.5K to spend then I would actually get this lens and be quite happy. It will take stunning telephoto photos as well as stunning close up shots of flowers, etc. But their sensor will never be as good as the R5 or future R5s, and their people/animal eye AF will never be as good, but most of their people will be OK with that.
All in all, it's a shame that they didn't come out with the EM1_III and this lens two years ago as it might have saved them enough to still be in business.