Update on my situation, as someone who was upgraded to Platinum in May last year and therefore ineligible for any of the formal status extensions. I ended up calling Velocity a couple of weeks ago and having a long conversation with one of the supervisors, who was very friendly but said she could do anything further than the already announced deal that nobody with expiring status would lose their status benefits until 30 September (though review dates would stay the same).
Interestingly, she confirmed that those status benefits included my Platinum upgrades, which would vanish from my account on review date of May 4th but which she confirmed would remain available for use until the end of September. She also said not to worry too much and that I should "watch this space" as they had something in the works for people like me.
Having taken another look at my account now my review date has passed, I see I'm still Plat (as expected) but my review date has moved to December, which is my original review date from back when I was gold. In other words, it's like I have had the 12 month status extension that I would have been eligible for as a gold applied to my account, but with my current Platinum level. Not sure if this is being applied to everyone who upgraded, or just because I asked (but was declined...). Weirdly, no communication at all from Velocity about any of this.
Anyway, I'm pretty happy with this outcome. Hope others get something similar.