She wasn't pushed out. She had a great rapport with Malloy, thought the Republican would win and didn't get the same warm and fuzzies. She knew she couldn't spend like she did the first few years. After 7 years or so, she decided it was time to move on.
I know that when she hired Warde, she thought she had the 'rock star" that would handle athletics. She was forced to learn about them and their importance early as Warde wasn't what she had bought. Susan loves what athletics does for the university. Warde hired Diaco- she went along with it. Diaco was all show - the women's events, the hair, the slick wording. It isn't the President's job to manage the football coach. Personally, she did not know about football programs(in her defense, most Presidents don't need to know). Whomever comes in next doesn't need to know the inner workings of a football program, but do need to make sure they give the AD and football coach the leeway to make it successful.