A few observations of my own, if I may. I've developed a morbid fascination with Wasps too, undoubtedly.
The Ricoh wasn't actually full on Saturday, just over 30,000 as I recall. Not bad at all, but not full. When you bear in mind what was riding on the game, finishing top of the top division, then actually this might be a little disappointing. It'll be full when Leicester bring their fans for the play-off I suspect, but it's perhaps telling that Wasps even when playing such a critical game still couldn't actually fill the Ricoh.
To clarify further, Wasps aren't making a million pounds profit per game - and they've actually made a £3.8m operating loss in the last season. And they've still got that £35m bond to pay interest on and then pay back in full. Plus this is pretty much peak-Wasps, their best season ever. Anyone who thinks there isn't risk in their model or that they're making a million per game hasn't quite understood rugby or finance, I'd say.
If Wasps drop down to midtable then they're likely to get middling attendances, as we've seen. Their average this season (before Saturday), when they've been pretty much unbeaten, has been
18.000 with a lowest of 12,000. Rugby fans can be just as fickle as footy fans, and possibly even more so given the lack of history for Wasps in Coventry. So don't assume that people will just turn up if they're struggling. By way of comparison you mentioned Gloucester - they have been at their ground for almost 120 years and are only a few hundred off Wasps' average attendendance but with a ground literally half the size. Rugby is a religion to many around that town, there's no comparison with Wasps in Coventry.
Last but not least, it was council that sold the Ricoh to Wasps. Joy and Tim might have driven the club into the ground, but it was the council and Higgs that
chose to sell the Ricoh to Wasps. That epitaph needs to go on more than one gravestone, imho.