Only "above and beyond" according to their policy. From a 3rd party view, they did the absolute bare minimum, and I suspect only because of PB's involvement. Thank you PB.

Not refunding miles after travel is taken is a pretty horrendous policy IMO. If that's what was used, that's what should be given back when the airline screws up.

I'm assuming the air check vouchers are what you think is the thing that made it "above and beyond"? I think that's barely adequate compensation for being forced to have a 17 lb lap baby and not having the space to adequately deal with your other traveling companions (in this case, little kids which makes it worse) which is the reason you expended extra to go to first class.

Other airlines routinely upgrade you and give you hundreds of dollars in vouchers when they take away your seat. In addition to refunding your ticket price. That's the opening offer often too. These were sliding scale vouchers given here. Down to $25. Sliding scale? That's almost thumbing your nose at the customer while offering the apology. Compared to what other airlines, like United, do when they take away a seat (and this is more of a screwup IMO than simply overselling), this is absolutely the bare minimum.