The 20-year-old has been at the centre of a few controversial incidents since coming through the youth ranks at Manchester United, but Allardyce said that he has flourished since refocusing his efforts.
His goal in today's 3-0 win at White Hart Lane was his third in the last three games.
"That was a genius goal [by Ravel Morrison]," Allardyce told reporters. "Tottenham had conceded two goals before this, but he just headed directly to Vertonghen and Dawson, slipped them like they weren't there and he used his outstanding ability to dink the goalkeeper.
"For me, you will struggle to see a better goal this season. The penny has dropped with him. It has dropped in lifestyle and attitude and his timekeeping, all of a sudden there is a belief that he doesn't want to do anything other than break into our first team."
Morrison spent last season on loan at Birmingham City.