Alright, here is my take on it...
I started my WVU/TCU comparison with the 2005 season since that is the first season for TCU in MWC the previous conference for them until they moved to the Big-12 for the 2011 along with WVU. This comparison covers an 11 year period:
Gary Patterson has been the TCU head coach throughout this comparison span while WVU Rich for 3 years, 3 years for Bill, 1 year where Bill and Dana had the confusing and chaotic overlap and then 3 years for Dana solo.
2005-2007
*2005 was the last year of 11 game seasons, beginning in 2006 12 game seasons became the standard.
WVU-Rich Rodriguez
2005 - overall 11-1; 1st in Big East, beat Georgia; final rank AP #5
2006 - overall 11-2; 2nd in Big East, beat Georgia Tech; final rank AP #10
2007 - overall 11-2; 1st in Big East, beat Oklahoma, final rank AP #6
TCU-Gary Patterson
2005 - overall 11-1; 1st in MWC, beat Iowa State; final rank AP #11
2006 - overall 11-2; 2nd in MWC, beat Northern Illinois; final rank AP #22
2007 - overall 8-5; 5th in MWC, beat Houston; final rank AP # Unranked
At this point WVU is ahead of TCU in every category. TCU is beating middling teams or those from non BCS conferences while WVU has faced 2 conference champs (SEC and Big-12) as well as the ACC runner up and beaten them all. TCU actually nose-dives in the 3rd comparison year, but that was also the RICH trash-fest and train wreck at the end of the season.
2008-2010
WVU-Bill Stewart
2008 - overall 9-4, 3rd in Big East, beat UNC, final rank AP #23
2009 - overall 9-4, 2nd in Big East, lost to FSU, final rank AP #25
2010 - overall 9-4, 2nd in Big East, lost to NC State, final rank # Unranked
TCU-Gary Patterson
2008 - overall 11-2, 2nd in MWC, beat Boise State, final rank AP #7
2009 - overall 12-1, 1st in MWC, lost to Boise State, final rank AP #6
2010 - overall 13-0, 1st in MWC, beat Wisconsin, final rank AP #3 (3 1st place votes)
It is obvious that Bill Stewart was not getting the job down. With virtually the same team that was in the national title in 2007 hunt under Rich's last season, Bill Stewart got lost and was out coached in many games. Now it is TCU beating some hot teams while WVU is losing to mediocre teams.
2011 - the OMG what was WVU thinking year
WVU-Bill Stewart and Dana Holgorsen in a chaotic bitter relationship spread across the news papers
2011 - overall 10-3, 1st in Big East, crushed Clemson, final rank AP #17
TCU-Gary Patterson
2011 - overall 11-2, 1st in MWC, beat Louisiana Tech, final rank AP #14
The next seasons are the Big-12 years for both teams:
2012-2015
WVU-Dana Holgorsen
2012 - overall 7-6, 8th in Big-12, lost to Syracuse, final rank AP # Unranked
2013 - overall 4-8, 8th in Big-12, no bowl, final rank AP # Unranked
2014 - overall 7-6, 5th in Big-12, lost to Texas A&M, final rank AP # Unranked
2015 - overall 8-5, 5th in Big-12, beat Arizona State, final rank AP # Unranked
TCU-Gary Patterson
2012 - overall 7-6, 6th in Big-12, lost to Michigan State, final rank AP # Unranked
2013 - overall 4-8, 7th in Big-12, no bowl, final rank AP # Unranked
2014 - overall 12-1, 2nd in Big-12, beat Ole Miss, final rank AP #3
2015 - overall 11-2, 3rd in Big-12, beat Oregon, final rank AP #7
Conclusions:
Rich Rodriguez was a batter coach than was Gary Patterson in the years Rich was at WVU, but the difference was not that great. Patterson seems to have gotten better and Rich's success since he left WVU has been spotty to average. Comparing WVUs run under Rich to Patterson's run 2008-2010 run we get WVU 33-5 compared to TCU 36-3 which is fairly comparable. Comparing the contrast from those years, Bills 3 years is WVU 27-12 and Patterson's years of 2005-2007 at TCU 30-8.
Totals for that period are WVU 60-17 & TCU 66-11. It must be pointed out that WVU was facing 3 or 4 ranked teams per year during this time, while TCU was often facing 1 or none until their bowl game. The MWC was much inferior to the Big East in this time frame and so comparable records indicate WVU is doing as well against tougher competition. That should imply that WVU is better prepared for life in the Big-12 than is TCU.
Now the final period...
WVU and TCU have identical over all records their first two years in the Big-12 but TCU always held the tie breaker because WVU lost to them both times. The next two years is a world of difference; WVU goes15-11 and TCU runs 23-3.
Some will argue that TCU is getting Texas recruits. I am sure they are, but haven't they always been getting them? Texas and aTm can only snag so many before TCU and Baylor etc. snap up the rest, that did not suddenly change when TCU entered the Big-12. TCU's coach is the game throughout this comparison so that is a stable factor whereas WVU has 3 coaches. Rich was better, but only slightly, Bill was less than Patterson and Dana would appear to be even inferior to Bill Stewart, much less Gary Patterson.
Draw your won conclusions as I have. WVU is where it is because we have a head coach that took over for a guy that really was lucky to be an assistant, but that also Dana is employed at the wrong level of college football. He is an even less qualified Power Conference coach than Bill Stewart was, but we assume that Bill Stewart would remain stable in the Big-12, when some of us believe he would have performed just as poorly as Dana Holgorsen has done.