I presume the Southwest pilot group has a grievance process so the whole story should come to light through the upcoming arbitration.
They have a grievance process, but just like KBUR, KMDW, ... you will hear nothing about it.
If she files a grievance, the first step is for the union to decide if it's justified. They can reject it or go forward with it if they think she has a case.
If the union proceeds with a grievance, the next step would be a System Board of Adjustment. It's a hearing where two people chosen by the company and two chosen by the union decide the case. In some cases the company and the union will agree on a fifth person. Only if a four member board deadlocks does it go to arbitration.
Company can make a settlement with the person at any time. Most settlements have nondisclosure clauses attached.
The NTSB report(s) will be all you hear.
Have standards for pilots been lowered to promote diversity? Should they be? Are they lowered for everyone or just diverse pilots? Questions like this are the elephant in the room when mishaps (e.g. the recent ones in LGA and BHM) reveal poor training performance and a troubling employment history.
There is no record poor training performance in LGA. The NTSB said her training records were fine.
What makes you think she had a troubled employment history? I haven't seen anything to verify that.