I've access to the AW website and have read the relevant BTs. It does seem strange that they don't just mod the whole fleet. Economic reasons, no doubt. Complain loud enough and maybe you'll get dealt with in a more satisfactory way. We did....
Hopefully the problems will get ironed out before we get our SP; we had to deal with most of the maladies that the early S suffered from and some other, less common ones too.