This is a joke. Konami have lost a LOT of credibility with this fiasco.
Had a whole week off work in the hope that I could either play this (or indeed the 360 version) but both have been immensely frsutrating and piss poor in the way that they have handled the online scene.
A theory behind that online disconnects is that the servers are so fucking overloded and slow, the game thinks a party has disconnected when it swaps hosts at HT. Totally fucking frustrating. Totally fucking avoidable if Konami had half a brain cell.