City forward Emmanuel-Thomas notched his 13th and 14th goals of the season in his side's 3-0 win, firing in with the aid of a deflection after 35 minutes and setting the seal on a convincing first-round victory by lashing the third goal in injury time.
Substititute Marvin Elliott had ended any doubt about the result by forcing home Marlon Pack's 87th-minute cross, but it was Emmanuel-Thomas who deservedly took all the plaudits.
O'Driscoll described the Arsenal product as "a maverick, but a match-winner", before adding: "It amazes me that people still question his work-rate.
"They say he is a great talent, but... We are trying to eliminate the buts and I see a player working hard for the team as well as delivering the goods individually.
"Jay has the ability to play at the very highest level and he accepts criticism from me because he knows I want the best for him.
"There are still things he needs to add to his game, but he is not lazy. His style of play can make it look that way, but it is a false impression."