I can understand their flying in to see her - if I had the money and it was someone I really loved, I'd do it. The yikes part for me is more that they already bought their tickets and now couldn't return them. THAT sucks.
Anyway, I'm also not thrilled with the idea of throwing the money away - and a performance is a performance, I don't usually regret even the worst ones I see. Not that I'm sure this one is going to be horrible, it's just going to lack one cast member that I was looking forward to seeing.
Anyway, moving on with life
The morning star always gets wonderful bright the minute before it has to go --doesn't it?