Prediction: Neither Gibby nor Towers make it out of June alive. MARK IT!! Your interim manager will be Dave McKay, and we might even see Dave Duncan replace Harkey as pitching coach.
You are on the right track, but Dave McKay has no managerial experience. He is not the man to finish a season which has already starting rebuilding.
Here is my recommendation for a strong staff built from within for the rest of the season.
KEVIN TOWERS -- He is no longer a decision maker. At best, he is a go-fer. Get rid of him immediately.
BILLY RYAN ------ Promote from Assistant GM to interim GM, with the option of interviewing during the off-season if he sees fit. (But understanding that the D-backs will want an experienced and successful GM.) Joe Torre makes the decisions -- Billy Ryan will do the legwork.
KIRK GIBSON ---- Get rid of him immediately. He is a free spirit and a free spirit can be anything from an innovator to a flake. The day he benched a young outfielder after getting 4 hits including the game-winning walk-off, then telling the Press that he wanted to "Shake things up" is when he defined himself as a flake.
ALAN TRAMMELL - Although he is a good guy, Kirk Gibson's best friend would have a serious conflict of interest staying on the job under an interim manager. Or even following him.
BOB BRENLY ----- Our former (Championship) manager, who, as TV analyst, is totally aware of every player on the team (as well as coaches) should accept the job of interim Manager, with the option of interviewing during the off-season if he sees fit. Although he started this silly concept of 130 different batting orders in a season, he is overall a major improvement over Gibson, especially as the team leader.
GLEN SHERLOCK - Having run the bullpen (and being coach since the inception, including under Brenly), make him interim Bench Coach (unless he is totally lacking in administrative skills).
DAVE McKAY ----- From 1B coach to 3B coach.
HENRY BLANCO--- From special assistant to 1B coach.
GONZO------------ From special assistant to interim TV analyst, as he has done before. If he would rather not, move TOM CANDIOTTI from radio to TV analyst. And have JEFF MUNN team up with the Guv'nor on radio, as he has done before.
Using in-house people to un-do the chaos of TOWERS and GIBSON would be a solid move to developing our young players, winning over the local Press and public and returning pride to the organization. With the worst record in the National League and 2nd worst in the Major Leagues, we need to restore pride. Especially with so many young players coming on board.
And, while I am at it, Didi is batting .196. When Chris Owings returns, he should be restored immediately to full-time SS and Didi moved elsewhere.
And the manager who decided to give Didi equal playing time should be gotten rid of immediately. Oh, I already covered that!
