So far there has been a one-sided promise to increase QE “in terms of size and/or duration”, i.e. maintain the “easing bias”, if the outlook for inflation worsens or financing conditions become unduly tight. It’s certainly a valid question to ask whether a promise that has a near-zero probability should continue to be made.
Indeed, in the short term the risks to growth and inflation are more on the upside, meaning that both could turn out to be higher than currently forecast. So it makes increasingly less sense to give a one-sided signal that addresses the eventuality of the situation unexpectedly deteriorating. So there is certainly scope for adjusting our communication on the easing bias soon.