I get that Jack is slowing down and isn't the player he was. But it is too early for the club to make the call on him yet for a number of reasons.
Firstly, we have a very different looking forward line at the moment, very tall then you throw Dusty into the mix. The coaches have a plan and I think at the moment it is taking time to gel. We need to monitor things before making harsh calls.
Secondly, the lack of defensive effort by Jack doesn't recognise what is happening up the ground. I thought Jack looked reasonable when we were creating forward half turnovers in the 1st half, with a lot of these actually coming from midfield pressure. In the 3rd qtr, Adelaide opened us right up in the middle which allowed their defenders to move the ball forward more confidently. We were terrible in stopping them in transition in that qtr. We tightened things up in the last qtr, and Jack looked dangerous again. I refer to my previous comment regarding Jack in the 2017 GF. He ran down opponents that day, mainly due to the tremendous zoning which stifled the Crows run out of defence and made them hesitant.
Thirdly, I don't think we have anyone ready to take his place just yet. KB and Bauer are no where near there yet.