Don't disagree it was personally best for Horn (and from an individual perspective, good on him if this is what he wants), nor that the timing could have been even worst (ie. mid season etc), but the comments of the board (see: SMH etc..) make it pretty clear he kept this one pretty close to his chest and for some of the reasons mentioned above the timing does seem poor.
At the end of the day though, if his heart isn't in it/doesn't want to be here, the Tah's are probably better off without him - so as you say, onwards and upwards. Now lets get on the phone to Baden Stephenson, maybe he wants to move north again