How long ago was it they you flew with them? They had massive issues with on-time performance but in the last two years they focused on getting that up and last year their OTP was much higher (For example, December was 84%, a 26% increase from the previous year).

Overbooking is something that is avoided but almost all airlines oversell their flights to guarantee a full flight. As for keeping passangers on a plane to duck tape a wing? I've never experience that. On Sunday I was flying down to San Diego and after everyone had been boarded the planes door was damaged by the jet way. They announced they were going to try to fix it but after 5 minutes they found another plane and moved everyone to it. There was an hour delay though as they moved all the bags over, fueled it, and loaded the food on (plus dispatch had to update records).

If you haven't flown with them in the last year or two, I would suggest giving them another try.