No, it's a red herring
Tom Brosz said:
"Looks like heatshield surface on the right. Really eroded--a lot more than what I've seen on Apollo capsules."
Look at the region between where the heatshield intially impacted and where the large fragments ended up. It's covered with little fragments of charred SLA561-V. Most of the "erosion" was due to structural disintegration that occurred at the time of impact. The heatshield is genuinely interesting. Unfortunately we can not trust the observed information about surface ablation and spallation. Too bad we're not going to get close to the backshell. It was still on a parachute and landed gently.
Gary