Launching 25 this late would have been a disaster anyhow. 25 would have cannibalized sales from 26, but it might not have sold well to begin with because people want to buy FM for the current season, not for the season that just ended.
What would be really good is if they got their act together enough to launch FM 26 early, like pre-launch before the transfer window closes, and launch a patch with the new squads as soon as the transfer window is done. It has always been a bit annoying that they launch in November, when the season has been underway for months.