So the last two segments posted during the night and I'm now officially a Lumo.
Not many fanfares yet, but I indeed got 8 + 4 upgrade certificates. And that other thread is absolutely right - upgrade availability seems to really have gone downhill a lot. Managed to only spend one shorthaul cert for a confirmed upgrade plus waitlist another one. In addition managed two confirmed longhaul upgrades and waitlisted another one so that's better.
I've got a bunch of flights I'd like to upgrade so I guess I'll call in tomorrow and ask about waitlisting those - web gives no option for doing so for these flights.
I've got quite a few HEL-CPH/ARN trips which do have upgrade availability but well, seems a bit of a waste to use the certs on these when I've got LHR/CDG/FRA/TXL bubblin' under too...