Former Bremen player Uli Borowka called for Schaaf's near 14-year reign to be brought to an end with the club set to miss out on a place in Europe for the third season in a row.
Borowka says there is no sign of progress being made, and Schaaf revealed he shares the same thoughts going into a game which could change his side's prospects this season.
A win would propel them into the hunt for a top-six Bundesliga finish, whereas defeat to a side who effectively denied them a place in Europe last season when they drew 1-1 in Bremen might spark slight relegation concerns.
The gap to the bottom three would still be seven points though.
"We had an endless discussion during our winter training camp about what had happened in the first half of the season," Schaaf said.
"Yet nothing has changed. Unfortunately, we have to repeatedly talk about the things we are not showing.
"We are unhappy that we are not always producing 60% 70 or 80% of our potential."
A 6-1 defeat at Bayern Munich last weekend laid bare the club's weaknesses and gave Schaaf a lot to analyse this week.
After in-depth tactical talks and video presentations, Schaaf hopes he has finally managed to strike a nerve.
"Talking is one thing, acting is another," he added at a press conference. "We only have ourselves to blame that these have not always gone together."
Augsburg's actions have spoken louder than any words since the turn of the year, and their coach Markus Weinzierl is hoping to keep it that way.
No triumphant proclamations were forthcoming after a 2-1 win over Hoffenheim last weekend that lifted the Bavarians out of the bottom two, and none can be expected to arrive in the near future either as Weinzierl says there is still a lot of work to be done.
"We have not achieved anything yet," he said. "We have taken a step in the right direction, but no more and no less than that."