Morrison spent part of last season on-loan at St Andrew's.
Doyle told the Mail on Sunday: "My first impressions of Ravel? That boy has got ridiculous ability.
"He does stuff with the ball you haven't seen people do. He is now showing what last season has done for him.
"He has gone back to West Ham and done really well. He has got all the ability but sometimes his attitude can hinder him.
"If he sorts that out then he can become a top player."
He added: "He is only 20, his aim should be to break into the England team. I would not be surprised if he keeps doing what he is doing that he gets a cap in one of the November friendlies - and who knows, with the carrot of a World Cup on the horizon."
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