Compare the seasons where it was the first for the qb to start since 2016. (and how jacked up is it that we are on 3.5 starting qb's in 4 seasons???)
The unit as a whole dropped after 2016. Really dropped last year (and Reagor had to be super man to make up for it). Losting KT hurt last year, but as a whole, numbers have been dropping.
https://www.sports-reference.com/cfb/schools/texas-christian/2016.html
https://www.sports-reference.com/cfb/schools/texas-christian/2018.html
https://www.sports-reference.com/cfb/schools/texas-christian/2019.html
Edit: What I am offering here is it might have something to do with who is coaching and how they are coaching rcvrs.
few things to consider.
frogs threw it 498 times in 2016 and completed roughly 58% of those passes.
in 2018 they threw it 409 times and completed roughly the same percentage of passes.
running backs accounted for just under 20% of the total catches in 2016 while they were just over 10% of the total catches in 2018.
yes, last year was dominated by a single receiver but it really isn't all the skewed in distribution when you compare the 2018 numbers with say 2015
https://www.sports-reference.com/cfb/schools/texas-christian/2015.html
there is a number of problems with this offense right now. some at quarterback, some at running back, some in the offensive line, and some at receiver.
i think scheme is an issue, i think the lack of creativity in using formations and motions to set up favorable match ups is an issue, the lack of player development and injury is a big issue.
not sure exactly what is happening at receiver. hights early on looked to be the guy who was going to the be the option opposite of reagor and then he supposedly gets hurt, but he is out on special teams last week.
thomas then stepped up and looked good until he very definitely got hurt. barber was gone for the first half of the season basically and then has 17 catches in 4 games. project that over a full season and you have a 45-50 catch season.
pro well has had flashes, and hunt and stephens have been inconsistent. injuries and inconsistency have hurt this group