Several things led to Frank's dismisal. A supposed affair, drinking problems and confrontations with Pedy even prior to him coming back. Lack of wins and a downward spiral of performance overall. Clownahan was on Pedy.
Jim Grobe was Tom's choice for the team, but the Watson card reared its ugly head. Grobe would not come with out his whole staff and Tom wanted Watson to help with keeping the recruits. Bo was the choice of a major booster, who paid the bills for Clownahan and Pedy. This was really set in stone in early October or late September. In honesty I really do not think Tom had a choice on who was coming in.