TCU got the best OL coach that fits TCU offense. This is not a coach that they pulled from another position, no, this was an outside hire specifically for the OL and this style offense.
Chris Thomsen not only has been a OL coach for most of his career. He has been a head coach and assistant head coach for some teams that play the same offense as TCU today at high level. Thomsen turned the ACU program into a perennial contender in Div. II, he coached five different Sun Devil linemen to All-Pac 12 recognition, he coached Texas Tech to a bowl game win, TCU is his Alma Mater which means he has skin in the game.
TCU has a real OL coach and I expect it to show. Plus, I trust Cumbie wants to one of the best which means he has to show his offense can produce. His first year calling the plays and being THE OC was a 11 win season. Pretty good year away from Doug Meacham. Sonny Dykes was a good mentor. This is Cumbie's beginning when he starts making a name for himself.