I absolutely get where you're coming from, but in my opinion, the redraws seem to be a vast improvement over the original chapters. I would rather them go back and redo it all to make the arc good than the arc be bad and them continue on.
While that is true, most other series don't have a release model like One-Punch Man's. Most other manga series release chapters as one-and-done things while One-Punch Man has always released chapters for free digitally first, with the caveat that they are always subject to change until they are published in the volumes (which, for all intents and purposes, is the only version of the One-Punch Man manga that actually matters since they are the finalized, canon version of events).