I think if you put yourself in a Championship managers shoes, managing a WBA type club, it doesnt really matter how much you are enjoying your time at said club, the lure of an Everton, a West Ham or even sadly a Wolves is difficult to turn down.
Even if Corberan gets us up, he will have a huge uphill battle to keep us there with our financial reality. A club like Everton or West Ham are established at the level, they have the big stadium, big fan base, greater resources and more potential to achieve a top 10 finish than an Albion.