Actually Allen and Murray decided to transfer after Spavital unannounced he was not coming back at Texas A&M as Qb coach and OC. If Allen and Murray did not like Spavital both Qbs would've stayed knowing they were getting a new Qb coach. Spavital head great relations with Allen. Murray was a true freshman and felt he should have more playing time as a true freshman but Spavital didn't think he was quite ready.
I just recall Murray having an outburst at Spavital during the Bama game once upon a time. Murray also was benched the next week(s?) for the incident. It didn't seem like Murray (or his Daddy) was a big fan of Spavital's.
Allen commented "negatively" on Texas A&M and the culture after his transfer, but he actually had positive things to say about Spavital.
Hail to thee our Alma Mater, hail to old KU!