I wouldn't ditch it, just make it that failing once doesn't lock you out, give players options to go further if they fail one Persuasion check. Many tables (not all) don't make it that you fail your goal immediately for failing one roll, so I don't think the game should either.
Yeah I like this. Like seeing Kagha go to kill the child after you fail the persuasion check you could have the option to trigger combat then and there to save the kid. It lands you with a straight worse outcome, but at least there's still choice within your failure rather than sitting and passively watching as a kid dies.
