Your critique of Patton is most interesting. But wasn't Ulysses "The Bulldog" Grant faulted for the same reasons, mainly spending lavishly on casualties for the sake of victory? There is indeed much to be debated.
Please talk some more about Patton's political ambitions (all speculation being wiped out by his death). Would Patton have succeeded in electoral politics, given his martial temper?
As I recall it, the Pattons of California (I want to say Marin County, but I'm not totally sure) were well-known supporters of political candidates, and were, in fact, the driving force behind California ordinances in the 1930's and 40's that, in all but the word, set up a regime of segregation in California. This might have, post-War, clung to Patton if he had run for office.
Patton's father had previoulsy run for public office unsuccessfully in the 1920's/early 30's (not sure of the date). There is reason to believe that he would have attempted to succeed where his father had failed.
The other side of the family (the Ayer's - Bea Patton's family), were also very politically active in Massachusetts, and more or less had the Mass. congressional delegation in their pocket. However, the Ayer's got themselves into trouble with the labor movement in New England with their anti-union stand, with Patton even going as far as to accuse the organizers of being "Bolsheviks".
Some believe this is where Patton began to form his ideas about the Russians and communism in general. That situation got extremely nasty (and violent!), and Georgie got involved. That perhaps would also have stuck to Patton post-War, if he had decided to run.
Patton's aide-de-camp (Charles Codman) very often took opinion polls, and scanned personal letters to the General from soldier's families back home to gague the political viability of a Patton run for office. Codman later claimed that he did this as a way to "butter Patton up" and to feed the man's ego, but many have doubted whether or not Codman would have devoted the effort necessary to do this without Patton's knowledge, or, a direct order.
Codman, unlike most aides-de-camp, was not only Patton's go-fer, he was Patton's fixer, and in the dynamics of Staff politics, it was usually left to Codman to soothe "the old man's savage fury" when something had not gone right within the Army. Codman spent the majority of the war fetching luxury goods, food and wine for Patton and helping to sharpen the General's political instincts, or more often, blunt his bull-headed attempts to enter the political fray, as needed. Codman, despite being a qualified artillery officer, was really Patton's social director, and was selected as aide-de-camp when Patton realizeed that the way to get himself some room to maneuver was to play the political game within the Allied command. Codman was the man designated to pin down the how-to's and why-fore's in that regard.
The Codman family was also politically well-connected in Massachusetts.
When Patton was relieved of command in 1943 after the slapping incidents (and worse! - there are also credible reports of massacres carried out by American troops) in Sicily, it was generally agreed that should Patton decide to resign his commission and go home, that he most likely WOULD have run for office and made life impossible for those who "put him into that position"; i.e., Ike, Bradley and Montgomery. Patton's good friend, Gen. George Marshall himself, talked Patton out of resigning altogether.