For you maybe, yes. I personally don't like silicon cases around my phone and I guess most iPhone users I see don't have the phone in a silicon case either.

At the end of the day, it is a design flaw, and quite a fundamental one at that (who would have though that the two antennae can be shorted, eh) So depending on how many people complain about dropped calls and poor reception, Apple may need to recall the phone. I doubt that giving people free silicon cases would make the problem go away for Apple.