I know a lot of people like redraw parts of their comic. Others also feel that this is a waste of time. Personally I think both views are valid depending on specifically what is being done. If it's only been a few months, redraws probably aren't warranted cause you likely haven't improved as much as you think (least not as much as you could down the line) and it hurts your production of new pages. However, it's also important to have the start of your comic really pop so you can grab your audience. I guess in general I'd say don't do it if art is the only thing you're going to fix because it's not as important as you may think.
However there are some exceptions to that even In the beginning I had some issues drawing my main character so some of the art really looks wonky. In those cases instead of redrawing the whole thing, I just did that one panel.
Let me hear your opinions and see your redraws below!