I seriously doubt the jets would be uncovered considering they set near the bottom of the bowl. I would first suspect the float is set low; that is one cause of the off-idle hesitation that you mentioned.
If the carb is unknown and acting up, checking/setting the float level is item number 1 anyway; most all carb circuits depend on it being right. Then reset the idle mixture screws to max vacuum when warmed up.
Also, check the PCV to make sure it is right; sucking air through it at a low speed, it should be open and free. But if you suck hard, the flow should restrict down. If it is not restricting properly when you suck hard (when there is high manifold high vacuum under deceleration or at idle), then too much air will be drawn in, and the mixture gets upset.
A vacuum leak would normally cause the idle to be bad all the time.
If your daughter does not want to drive it, then adopt me and I'll drive it LOL!
