We'll have to see how the RBs perform against opposing defenses before stating ND has a top 10 offense. Keep in mind the running game was pretty meh until Dexter returned to the field in the 5th game of 2018.
WRs also concern me in that outside of Finke & Claypool (& maybe Michael Young) there is a lot of POTENTIAL to be great. But that's all it is, potential. Austin, Lenzy & Keys could have breakout seasons but Book has to get the ball to them first & he did struggle with the long ball (see Northwestern game)