Just to clarify, asking to return to the old way to update reviews "without losing helpful votes" on the original review. Sometimes updating a review may only be a few sentences.
I wrote all my reviews on DGCR. The review page used to time out after a certain amount of time. So I'd write for 15 minutes or so, submit, then just go back and add to it until I felt I covered everything. Probably "updating" anywhere from 4 to 8 times a review. If the new review page doesn't time out it's not that big of a deal for me. I should still be able to add something the next day, week or year though too.