I like Spencer Lee. I think he is an incredible talent. However, he doesn't have that IT at the end of matches that some guys have. He definitely has gas tank issues as well.
I honestly chalk his deficiencies up to the fact that in his more formidable years of wrestling development he was so dominant that he was not exposed to the situations he needed to in order to be that guy at the end of matches. He never had to have a gas tank because matches were over in the first period. He didn't have to dig deep to pull out a win. Look at how he has performed over his career late in matches. Look at the deer in the headlights look he had against Austin DeSanto when he was a senior in the finals. He had never been in that spot before. That has always been the roadmap to beating Spencer. He is Mike Tyson from Punch Out! You have to weather the storm early and then he's a completely different opponent in the third.