Hey
agbsharma thought this article might be helpful for you-
https://99colleges.com/low-awa-score-sho ... -the-gmat/Your 4 at least falls into the "adequate" bucket. Yes we probably never want to be described as "adequate," but I think is less likely to raise flags from the adcoms. Would hate for you to have to put in that extra effort to the GMAT again this close to the R1 deadline and hope you don't have to. Seems like a 3.5 might make it a bit of a different story. Just a fellow applicant here though. It sounds like the biggest question adcoms will have will be whether there is a discrepancy between the quality of your essays and a 4 AWA.
Admissions consultants usually check and respond to posts in this forum, but if you don't get any responses from them you might re-post in the Admissions Consultants forum. This feels like a bit of a more technical answer, especially about the re-scoring. Congrats on the 750 though and fingers crossed they say you're all good and to focus on your applications right now!