Hi Juddles,
I think you make an important point - 'the staff were great at handling this'. The QF staff really are quite exceptional. FWIW, I've had IFE systems down a couple of times over the last year, the most recent being a J class flight LAX-SYD in late February. No compo, no suggestion of any for that matter.... I really would have liked to have watched the new Blade Runner film, but my body thanked me for the 'forced' rest.
I did write to QF Customer care (the email address is no longer valid) so I used the website contact portal.... that was more than 6 weeks ago.. and I've heard nothing back. To add insult to injury, I booked the flight less than 24hrs before the double SC promotion - which would have easily bumped me back into Gold status... alas, my renewal (birth) date was Feb 28 and I missed out on Gold by about 75 SCs.
So... I cry with you amigo.... less 10k points. Stay strong!