Well.. put it this way, would your suggestion increase or decrease chances/threat of offer sheets?
i don't think it would change things much offer wise, but it would give the affected team some compensation for their trouble. I'm sure most GM's go into the off season with a plan, and an idea of available finances to make his team better. An OS throws a wrench in that planning, and causes him to spend more time (and stress) reevaluating his possible courses of action. Time is money, after all. A third/fourth round pick is not too much to ask for the inconvenience.
One reason I thought of it was all the comments, once the Aho deal was matched, of people saying "oh well, it did cost us anything to try", after all the time and energy it cost the Canes GM/Owner. Not really fair. They didn't forfeit Aho, but it did waste their time and energy, and had to accept a deal they didn't get to structure themselves. JMO