Many Reds fans are stilling trying to figure out what the midfielder brings to the party.
In the three years since the 25-year-old moved to Merseyside, he has done very little indeed. You could count the amount of significant performances on one hand and the fact he has only ever been able to play simple passes and not do much else still hasn't changed.
It was no surprise that Allen was involved in the Reds' 2-0 defeat at Newcastle United on Sunday.
The Welshman certainly shouldn't be used as a scapegoat. Jurgen Klopp got his line-up and tactics wrong, while every Liverpool player was guilty of putting in a poor display.
Allen was simply a passenger, though. And why should he be given game time just because he is a member of the squad? Lucas is Liverpool's first-choice holding midfielder and Emre Can, suspended at the weekend, is another man Klopp can turn to.
People may suggest singling Allen out is unfair but the problem now is that sympathy has become detrimental to the cause. Liverpool should have sold Allen while Brendan Rodgers was in charge but the Northern Irishman was keen to hold on to a man he himself brought to Anfield.
Klopp is a very friendly, hands on manager whose faith in every one of his players will no doubt reap its rewards with time - some squad members have already transformed under the German.
But good management is also about making tough decisions and cutting your losses. Allen should go in January and the fact he has become so heavily criticised there is a large degree of pity for him shouldn't matter.
Now is the perfect time for Liverpool to part company with the Welshman amicably. A new era is beginning under Klopp, meaning Allen can embark on a new challenge of his own. It would be a better option for the midfielder himself than continuing to struggle against the tide at Anfield.