It doesn't seem super beneficial really.. I mean, you can redraw it, but it'll take away time from drawing more new material. On top of that, wouldn't there be a quality drop from the first to the second chapter once you do finish? I can see this pushing others to redraw more chapters until the quality's evened out, which again, that's time that could be used to make more new chapters.
I'm of the mindset that likes seeing the improvement of an artist in comics or mangas so.. I dunno, it seems like a wasted effort to me. If the story's good enough, I say leave the art alone. That's up to you though, if you wanna go redraw, then go for it, dude!