It does look similar but there are major difference. Even the style of offense has a major difference because Seth has a much higher priority on running the ball than Leach ever did. Our issues at running back and offensive line are a major part of the issue this season.
Throw out 2016. Seth was five games with a team that was one the year before in with true freshman at quarterback and completely different offensive system. Last year we won 9 games and the West Division title which no one realistically saw coming.
You bring up a great point with our issues with physical defenses. That's always going to be an issue with this type of offense even if we had five quality starters. That's probably why Seth likes to lean heavily on the running game.
Go through Seth's three seasons (actually less than three seasons) and find another game that we lost when we certainly should have won. I think we blew the game against La Tech but that was no gimmie at all. Coming into this season, I believe Seth was 7-1 in games decided by 8 points or less but is 1-3 this season.
Does this look like Leach's Tech history? Yeah but it's been less than three years. Fortunately, Seth doesn't have to compete against Texas, Oklahoma, Ok State, TCU, etc. Texas Tech was always at a disadvantage in talent. Seth has the opportunity to have the best talent in CUSA. That can make all the difference in the world.