Bayern's defence of their European crown came to an end at the quarter-final stages, with Paris Saint-Germain progressing on away goals.
Eric Choupo-Moting's second-leg header was not enough for the Bavarians to overturn the 3-2 defeat they suffered at the Allianz Arena last week.
"I'm overwhelmed, I don't know. At 25 years of age, he's still unfinished," Scholl - who won the Champions League in 2001 - told BILD.
"When do I dribble? When do I pass the opponent on which side? The mix isn't right yet, he still lacks structure.