Sullivan lost the challenge and the goal counted, but Lidster saw positive ramifications for the Penguins, who tied the score 1:06 later on Crosby's goal.
"Clearly it was an opportunity there for that to get [called] back, but what I really liked about it was it also took the crowd out of it," Lidster said. "It took an awful long time to look at it, and shortly after, there was a commercial timeout. So they never really got any momentum there."
Crosby's goal left the game tied entering the second period. But the Predators scored twice in the second and took control.
The Penguins need to continue to play to their strengths, Lidster said, utilizing Malkin and Kessel.
"[The Penguins'] strength is in the speed of their forwards," Lidster said. "I think that they need to get speed back into their game. There were a couple of shifts there early on in the second period where I thought Pittsburgh did a really good job. There was the one Crosby just got it in deep, pressured the puck and threw it to Guentzel in front.
"That's their bread and butter and they have to stick with that. It gives them offensive zone time, it takes pressure off their defense, puts pressure on the Nashville defense. So getting those pucks behind Nashville defenders, that's going to be key for them. That's their M.O. They have to continue to do that to be effective."