( a ) He does not always do the presser with Gore. He's done it with Crabtree, Boldin, by himself, etc. He does this so as to not hog all the limelight. He's trying to reinforce to his teammates that he is there working the grind with them and doesn't think too highly of himself.
( b ) Why he dresses the way he does:
Why does Tom Brady dress like a metrosexual for press conferences? My guess is he likes the look.
A...do you seriously believe the BS you're selling? ALL QBs do interviews by themselves. Since when it meant they were "hogging the limelight?"
B. He dresses the way he does because he knows the media wouldn't say ish about. They already having their whopping boy in Cam. They can smear him at free will and folks will simply buy it because they will look at Colin and assume Cam is the same.
Remember to some, we ALL not only look alike and ACT the same.