Thanks for your inputs.
I'm with the same employer and I was also of the same opinion that the old EB-2 should be sufficient. However, I reached out to my attorney and my attorney says otherwise.
Just for the benefit of everyone, quoting my attorney, " Our first step would be to submit an I-140 filing to reinstate the EB-2 I-40, since the EB-3 I-140 is currently the governing I-140 in your AOS case. Once the EB-2 I-140 was revived/reinstated, we could submit a formal interfile request". As they are the subject matter experts, I'm just following their advice.
Refiling was never discussed. Will reach out to check if that can be done.