Is it really untested?? When we started Coutinho behind the front three or Lallana then surely Shaqiri is in a similar mode so its a wee stretch to say we have not tried to play an attacking midfielder with the attacking trio before.
Yes it is untested, the manager says it is, Lallana hasn't played behind the front 3, he's played as an 8.
Shaqiri is new to the group, and whatever we've done with Coutinho is not relevant to what we're doing now and he[Klopp] wasn't saying that the final third wasn't working with Shaqiri playing in the role he played, he was talking about the defensive shape when we we were defending and being countered.