personally I don't see how this is a big problem. I have never had this issue through beta and Season 1, and via laptop, ipad and mobile access. I understand that it's frustrating, but its an unnecessary addition.
John, you may regard it as "an unnecessary addition," but most of the games that I play - such as Hattrick - include a dialogue box and "confirm" and "cancel" buttons after an irrevocable change (such as firing a playing in Hattrick) has been initiated. You may never have had an issue with it and may never have an issue with it for as long as you play the game, but that doesn't mean that others haven't or might not in the future have such a situation appear.
perhaps for chassis designs, but apart from that, the rest are minor irritants and are just the facts of playing the game, that you sometimes make a mistake.