Let's take a closer look at Jeff Quinn.  He was the OC under Brian Kelly at Grand Valley St., Cincinnati, and Notre Dame.  We know that Kelly's offenses were terrific, but I would assume that the real OC was Brian Kelly and not Jeff Quinn.  But, Quinn has his own resume, separate from Kelly as he was head coach at Buffalo for 4 1/2 seasons from 2010 to 2014.
Let's look at the offensive results:
The two years before Quinn at Buffalo:
2008:  #53 in total offense, #33 in scoring offense.
2009:  #39 in total offense, #82 in scoring offense.
Quinn's tenure:
2010:  #111 in total offense, #120 (last) in scoring offense.
2011:  #80 in total offense, #97 in scoring offense.
2012:  #83 in total offense, #99 in scoring offense.
2013:  #78 in total offense, #54 in scoring offense.
2014:  fired midway through the season.
So, Buffalo had a competent offense in the 2 years before Quinn got there and he turned it into probably the worst offense in college football in year 1 and never really got the offense competent in 4+ years at Buffalo.  It seems Quinn pushed out Buffalo's starting QB (going into his JR year) just after being hired because he didn't fit the offense he wanted to run.  I just don't see the offensive results to be considered for UConn's OC.
Personally, I think we need to pass on Quinn at OC and look for an OC with more proven results.  I would consider Quinn to be Associate Head Coach to mentor Diaco.