Bruschi's strength has always been his ability to know what the offense is going to do before they do it. That ability does not change with age.
He has been slowed by injuries the last 2 years, and he is getting older, but he is still getting it done. Check the stats. As he gets older they will start bringing in better cover guys on passing downs, but he is still getting it done.
The media has focused all year on the lack of WR's, the Pats are declining, etc. Therefore, they have focused less on the "name" players.
Keep running at 54, we'll be fine.