I agree with what you're saying. It needs to be a careful process because it can be a pain to move sites between hosts. It would be most irritating to move to a host and then find you don't want to stay with them almost straight away.

As for the support ticket idea, I've come accross hosts that don't require registration to use their support system so it would work for them but you're right, not every host operates like that.

Ta,
Matt