Lienert, 26, standing at 195cm, was drafted by the Power as a rookie in 2016, but has only featured in 23 games in his AFL career so far.
Lienert only managed to get his first opportunity in Round 14 and had featured in five games in a row before being omitted again this week ahead of the club's Round 19 clash with Collingwood.
Speaking on SEN, Cornes doubled down on previous comments oh his where he had been bemused by the defender's decision to remain at Alberton, saying that a number of rival clubs could use his services.
“I said it last year during the trade period that he should be looking elsewhere,” Cornes said.
“There are a whole host of clubs that could use him and his height in defence.
“Now they’ve got a couple of good players out of the side with (Tom) Clurey still not in there.
“You’ve got Lienert and Clurey out of the side. Clurey’s always been a walk-up player in that defensive set-up."
A South Australian native having come from Imperial in the River Murray Football League, Lienert is averaging 16.8 disposals and 4.2 marks per game in 2021, as he continues to fight for his place in Ken Hinkley's side.