By de-tuning the ILS I was intending this for the NG series - so I should have read the question but flicking it to auto will have the same effect. Flick the changeover button, FD defaults and then you can select the ILS freq again. Obviously this would only be recommended as per the question when above 2000' when a TOGA go-around is not available. I agree that by deselecting the AP and turning off the FD's has the same effect but its a lot of faff.