There have been plenty of wobbles this season - their draw against the Reds in Brisbane, 43-5 thrashing at the hands of the Lions in Johannesburg, and inability to finish off the Crusaders at Eden Park and Hurricanes (twice) - are testament to that, but there has been tangible progress.
Umaga said after his team's win over the Brumbies, their best performance of the season to go with their surprise round one victory over the defending champion Highlanders, that strengthening his players mentally had been key.
"Hopefully you've seen that, just in terms of coping with adversity on the field, and just that confidence to play," he said. "That's what we did as kids, that's how the game is played. Obviously the game is faster and tougher and harder now, but in the end it's still the same game. When we enjoy ourselves and are united as a group, we go well, and we want to continue doing that."
That may not bode well for a Waratahs team probably still reeling from their 28-17 defeat to the Hurricanes in Sydney at the weekend which leaves their finals hopes hanging by a thread.
Daryl Gibson's team will travel hoping for a miracle and that could play into the hands of the Blues, who made 22 clean breaks to the Brumbies' five and 22 offloads to the Brumbies' seven.
The Blues recent record
2016: 11th; 7 wins, 1 draw, 6 losses*
2015: 14th; 3 wins, 13 losses
2014: 10th; 7 wins, 9 losses
2013: 10th; 6 wins, 10 losses
2012: 12th; 4 wins, 12 losses
2011: 4th; 10 wins, 1 draw, 5 losses
*One match remaining.