Morrison started for the first time since Warnock's appointment in their 1-0 defeat by QPR on Sunday.
The manager believes if Morrison's mentality is right, he can fulfill his potential: "That's what I said to him yesterday, all these managers can't be wrong, you've got to now see where you want to go.
“You can keep going round the houses from one club after another or you can try and make a statement, whether it's Middlesbrough or his next club I don't know but he's got to decide what he wants to do.
“It's a great life, wow if I had his ability. He did something on the training ground yesterday and I wish someone had filmed it because I couldn't work out how he did it.
“He went past somebody with a shimmy and it was amazing. I hadn't seen anything like it since [Adel] Taarabt or I think Victor Moses did something like that at one stage."