I agree with Becky that this picking apart every little thing about Jon's voice or Richie's guitar playing...has been done already a million times!!! I am not aiming this post anyone in particular, so please don't get offended.
Fact is, Jon is 40 years old and smokes. You have to realize how much those two factors affect your performance. I am a vocalist. I am only 29, I don't smoke and I have noticed changes in my voice over the last 8-10 years.
I'm not saying that just because you are a fan, you can't criticize, but it seems like some people are so critical of the band. (No one on this thread as of yet

) I personally would rather see Jon change his style of singing as he gets older and have the band around longer than have him try to squeeze out notes that he can't hit anymore and cause damage that forces the band to retire earlier than they should.