Although we won, Norwich had sussed out how to beat our system. They simply weren't good enough on the day to execute it. They were trying the things Villa ended up doing. There was an opponent just before that too, that were also starting to counter us.
As all our no plan B managers have found, it's really hard to adapt when other teams counter your only tactic. Ralph had come back from a previous slump. But SR were in for the second one, enforcing tactical tweaks through Selles. SR love a single revolutionary tactic, never wondering to ask what happens when it's countered.