We do have tightends and running backs that can catch the ball too:
Ben Watson, Daniel Graham, Corey Dillon, Kevin Faulk say hello.
Patrick Pass has been productive in the passing game too.
We drafted two tightends who were very productive pass catchers in college.
David Thomas, Garrett Mills. Will they be just as productive in the pros? We'll have to wait and see.
We have also drafted a pretty good RB, Laurence Maroney, who is also capable of catching the ball too. Will he be productive in the pros? We'll have to wait and see.
Check the Patriots depth chart. There are 5 other WRs on the roster:
http://www.patriots.com/depthchart.cfm
Zuriel Smith, Rich Musinski, Michael McGrew, John Stone, Erik Davis
Now I know, that they are all long shots to make the team. But you never know what can happen in training camp. BB/Pioli have a knack for finding gems. Remember David Givens?
The point that I'm trying to make is the Patriots offense is very flexible. They don't just rely on WRs to catch the ball. There are other options, IMO.
Could we use another WR? Sure we could. But I really don't think it's that bad.