An additional thought, not about 2nd Draft in particular, but about critique services in general:
While a paid critique may in some cases be useful, in many others (perhaps a majority) of cases, it's used as a method of short-circuiting the process that makes someone a writer.
If someone else tells you how to "fix" your manuscript, then at some level the writing is no longer yours. At least part of it is theirs. There is value to struggling with your writing because when you solve a problem, it's really you doing it.
I think there is value in having someone tell you what they think is wrong with a story. Telling you how to fix a story is less useful, imo. When someone tells you there's something wrong with your story, they're almost always right. When someone tells you how to fix your story, they're almost always wrong. Because they're telling you how
they would fix your story, not how
you would fix your story. Finding your own solutions is what makes you a writer.
The above is not true, however, if the person giving the critique is an aquiring editor. If an editor says "fix it this way and I'll buy it", that's how I'd fix it.