I strongly disagree with this statement. Just because a QB is good, does not mean you should not upgrade them. If Gettis and Lafell don't produce as they should next year, yet are still average and not "world beaters" I think you MUST upgrade them. Look at the Patriots. Tom Brady is a HOF quarterback, who granted won a superbowl with not so great receivers (but a kick ass defense). However, they continue to upgrade his weapons and receivers all the time.
Of course the season has not started yet, but I simply don't see Lafell as the answer. Gettis I think has serious potential. He was putting up decent numbers with Clausen and no Steve Smith. Lafell, he simply did not produce even when he got into the lineup when Naanee went down. As I said earlier, yes he can catch and I was more harping on two seasons ago and the preseason... BUT, if you watch the games, he simply does not put up great numbers. The last three games he put up 0, 100, and 27 receiving yards. The 100 yard game was mainly off a 91 yard TD catch that was busted coverage..... I simply don't have faith in his ability to get open.
I am not saying just because we have a good QB, don't upgrade them. You should always look to upgrade any position you can. But when you have other positions that are in worse shape you don't start upgrading a position that is currently in adequate shape. You don't want to hinder the CB, DL, LB position by drafting a WR in the early rounds. Also, if you look at Brady's and Manning's WRs in the past, they really weren't that great. You'd have a top receiver like Marvin Harrison or a Wes Welker but that was about it with them. LaFell should be fine, he looked just as good as Gettis their rookie seasons. It's just going to be difficult to replace Smitty.