Rear ended. I got “at fault” and she got a DUI

Location: Atlanta, Ga

I was recently involved in an accident and need some perspective on how insurance companies handle split fault when a DUI is involved. Yes, I’ve already reached out to a lawyer, but I’m looking for some anecdotal experiences.

The Incident:
I was merging from the left lane to the right lane. While I was merging, the car behind me accelerated (I can't prove this, but I know she did). Right after the merge, the traffic light ahead abruptly turned red, so I had to brake hard. The driver behind me failed to stop and rear-ended the rear-right side of my vehicle.

The Police Outcome:
The responding officer reviewed a nearby camera and ended up citing me for an improper lane change. However, the driver who hit me was arrested at the scene and ultimately charged with a DUI along with a few other charges. I strongly believe her impairment caused her to make the wrong inputs (accelerating, missing the yellow/red light change, and failing to react in time).
I’ve already reached out to a lawyer, but I’m looking for some anecdotal experiences and insight on two things:

1. Insurance Repairs & Rates: My insurance offered to pay for my repairs upfront while they conduct their investigation. Will my rates spike just because they are paying out right now? Also, it was a minor fender bender, but I had child car seats in the vehicle. Should I report the car seats to insurance, or try to keep the claim as "cheap" as possible?
2. DUI vs. Citation Fault: Can the other driver still be determined 100% at fault by the insurance companies because of the DUI, despite my improper lane change ticket? Will her insurance end up paying for my repairs?
   Thanks in advance for any insights.