An actual passing tree, not just 3 kinds of verticals.
So by "credible," you don't mean effective, you just mean complex. Fine. By that definition, I agree.
However, if we are talking effective, I would just offer this:
2009 - #1 in the county in yards/attempt; # 12 QB rating -- 11 wins
2011 - #1 in the country in yards/attempt; # 14 QB rating -- 8 wins
2012 - #2 in the country in yards/attempt; #35 QB rating -- 7 wins
2014 - #3 in the country in yards/attempt; # 12 QB rating -- 11 wins
2016 - # 4 in the country in yards/attempt; # 16 QB rating -- 9 wins
Seems like, when we have the personnel to run it, the passing scheme can be quite effective. When we don't, it is not. See 2017: # 42 yds/pass & #100 QB rating and 2018: #90 yds/pass & #119 QB rating.
Personally, I am fine with our passing scheme, but am disappointed we have not been able to reliably recruit and maybe more importantly retain the talent to implement it consistently. That, of course, is on CPJ too. And that is my frustration with CPJ, not his passing scheme.
http://www.cfbstats.com/2018/leader/national/team/offense/split01/category02/sort02.html