I wouldn't totally blame Gene for Break the Bank failing. That show was an utter disaster, and this is coming from someone who got twisted enjoyment out of Eubanks Dollar a Second.
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If anything, Gene was led into thinking that he could add in his own hijinks to BTB. If you watch the two episodes from the first week of BTB, Gene seems to be injecting a lot more fun stuff in the bonus game than he did in later episodes. Apparently Kline and Friends disliked his antics and told him they wanted a more serious show. Match Game started off as a pedestrian, dull game which Gene saved with his spontaneous, zany humor. Obviously he thought the same thing could be done to a dull, weak format that Break the Bank was.
Another problem with the first week of shows was that Gene was obviously not briefed about the stunts, nor their location in the prize vault. Most of the time, he was scrambling asking "where's that?!" Also, because he was obviously going into the bonus game with no preparation, it took him longer to explain the stunts. They later wisely decided to stop the clock during Gene's explanations.
The stunt format had its flaws, but I think taking out the stunts shortly after Joe Farago took over was not the right move. BTB was just another dull Q&A without the stunts, and Joe Farago was pretty much a straightforward MC that added nothing to the show. He wasn't so bad, but he wasn't exactly memorable either. If it was me, I would've taken out the quiz element and somehow incorporated stunts or mini games into the main game.