The fact that your instructor didn't pay much attention to it doesn't change the fact that now you know a whole lot more about what you should be putting into your pre-diving plans than you did before!Well, I finally finished and completed my Rescue - after all that, the instructor didn't even ask about the emergency plans until i reminded him. When I gave him the plan after the course, he didn't even check it and tell me whether it was right or not..oh well.
And you know something about instructors? They often have more to impart to their students than there is time for during the course.
One thing you might do if you're motivated to follow up...
Go over to the dive shop when your instructor is there, you can call ahead and make an appointment, and spend 15 minutes or so going over your emergency plan. Your instructor will likely be happy to go over what you've got there and make any suggestions that might be appropriate for the local diving in your area. Your instructor does not stop being your instructor just because the class is over.
I hope you found the class very rewarding, and hope you can put the knowledge to use in your diving.
Doc