Heupel isn't the best coach out there. You need a Saban, Smart, Meyer, Swinney type coach to win it all and Heupel isn't that.
Heupel is still a good coach. We can win a lot of games with him.
Tennessee isn't an elite program. Tennessee is a state of 6 million and is in the 20s when it comes to recruits it produces. It is outshined by the states of Georgia and Florida on population; and Louisiana and Alabama in blue chip recruits produced. However, Tennessee plays against teams from those states. Therefore, 90% of the time, Tennessee is OUT RECRUITED by Alabama, Florida, Georgia, LSU, and sometimes even Auburn.
We also now have the mammoth state that is Texas in the SEC with 3 SEC programs attached to it (I am including Oklahoma in that number).
We just can't compete, blue-chip wise, with these other SEC powers. Georgia has Atlanta and is located in the state that produces the third most blue chips. Florida is a massive state with Miami, Jacksonville, Tallahassee, Tampa, the Panhandle, etc. that they can pull from.
Tennessee can't recruit against this.