In the final cut of the flick, Biggs is better left just another member of Red Squadron.
I feel that if it's left that way the "it'll be just like beggar's canyon back home" line doesn't work well. I know it's not 100% necessary to explain the line, heck Luke could just be talking to himself. I just think that It has so much more meaning with the whole Biggs subplot, and that changing it back to having him as just another pilot misses out on a cinematic opportunity.
Unless I'm mistaken, when Luke is told he has a fighter on his tail, doesn't Wedge tell Luke that he was "On it", then Luke looks around and says the line?
Yeah, you're right. But to me the Biggs line implies that Luke is wondering where Biggs is, and that he's thinking "why should wedge have to save me, I've got an old buddy for that sort of thing!" I just feel that it is in good keeping with their implied back story. Of course, this all depends on whether or not one feels that the hanger scene works well. As is quite apparent by now, I do believe it does.
This is the last I will say of the Biggs line.