I too frequently occupy a 737 exit row. As said several times above cabin crew usually any stress opening the door and nobody will be here to help. Partly because I am a PPL smartarse and partly because I think it is relevant I sometimes say out loud for others to hear - don't open the door if there is fire outside.
The point about waiting because the engines might still be running I had not really thought about but I am sure it is something that should be on the card and which most people would easily grasp. Probably would not make much difference in a panic situation but might give some cause to think twice in a lesser emergency.