Yeah, not the smartest idea. The me, me, me mentality wins again. Putting people's safety at risk to meet a character... Lemme guess, your wife was using the stroller as a plow?
It's not up to the CMs to do anything at that point. You're "on your own" so to speak. Disney isn't going to send CMs out as personal assistants to tell you that "we see you have another event coming up, but the line's getting long... you might want to head to your other event".
No. The system works the way it should. Sorry bout yer luck if you happen to be in a short standby line for an attraction which can be a FP+ alternative if a ride close by goes down. Disney has no reason at this time to change it so that the ride within X proximity of Y attraction that goes down is off limits to the FP+ compensation.