Sure there is. WR is a need--I agree. However, Cam led the NFL in landing on his butt. Many of his throws were inaccurate because he had bull rushers throwing his interior linemen into his grill and he was not maximally effective because the running game struggled. Take care of the OL and the rest of the O gets better.
For example, how good is Lafell? (I bet you have an opinion). How often was he targeted vs. Smith and Olsen? How often do you think that Lafell was Cam's first read? Second? Lafell was usually the 3rd read. How often did Cam get hit or pressured before making his third read? I am not sure we know how good he really is because our OL or QB have sucked since he arrived.
Our OL depth is a joke. The entire right side of our line is a joke.
My point was, there are needs that are practical and boring that come before needs that are flashy and exciting. Get the line right and everyone gets better.
If we bring in Patterson and go with Austin at RG and Bell at RT, be prepared to be disappointed.
Personally, if Lane Johnson is there, you take him and laugh about it for 10 years. Replace Bell in 2013, switch with Gross in 2014. LTs are hard to find.