Petrevski-Seton requested a trade back to his home state of Western Australia on Tuesday, with the West Coast Eagles being his preference of the two Perth clubs.
The outgoing Carlton defender has endured a frustrating season with the Blues, in and out of the side to play just 14 of 22 games in 2021 and averaging 14 disposals per game.
Thomas endorsed the 23-year-old's potential, claiming that Carlton may regret not utilising his full potential, which could be tapped into elsewhere.
"He has unbelievable skills... probably starved of opportunity.
"Next year he'll certainly be in that conversation of recruit of the season."
Former Carlton list manager and club legend Stephen Silvagni also believes that Petrevski-Seton was under-utilised at the club.
"I certainly think he's been played out of position," Silvagni said.
"He was bought to the club as a midfielder-forward, he's been playing half-back the last 12-24 months, that doesn't help him."
Fox Footy reporter Tom Morris has claimed that Carlton won't play hardball to keep the 94-gamer at Princes Park.
"I don’t think Carlton’s going to play too hardball on this because they know if they were going to give Petrevski-Seton a contract, it wouldn’t have been a big contract, might have been just one-year deal. He wasn’t necessarily a hugely required player for them," Morris said on SEN.
Carlton's Sam Petrevski-Seton has requested a trade, reports @rileybev.
— AFL (@AFL) September 21, 2021
Morris also explained the situation that West Coast are in, in their bid to land the 23-year old.
"West Coast sees him as a midfielder, and they want him replacing Luke Shuey when he retires getting inside that engine room."
"West Coast has pick 10, they’ve also got two second-rounders and I think one of those picks will get it done – 29 and 35."
"He’s going there literally for a new home, for a fresh start."
Petrevski-Seton has played 94 games for the Blues since making his debut in 2017, first joining Carlton from Claremont as the sixth overall selection via the National Draft.