First problem is we're so shallow that this is the kind of decision he has to make. Also I want to say that I think Warso is doing a good job with lines, the system, and the team attitude and these things had us in the game.
However, either take the TO like
@TheBeard is arguing, or put out the third line. You don't want the team to sit back on their heels? Put out Smith - Goody- Kunin and see if we can get some OZ possession and give the kid some pressure experience.
Alternately, as you said, Sturm-Kunin-Goody gives you two guys who can take a good face-off, and a lot more experience than Cardwell. Any of these options better than what he did, and anyway, he did the same thing at the end of the 1st/2nd, the season opener, etc and it just doesn't seem to be working with our personnel. Not a huge deal, honestly, just a minor annoyance despite feeling like Warso is doing a decent job.