Zora Stephenson and Abby Chin are professionals, I find it very hard to believe they are going to "ruin" the broadcast. Everyone involved seems to already have experience in the job they will be doing.
Ultimately I expect they will be miles better than some of the broadcasters out there. Reggie Miller, any Van Gundy, Doris Burke when she covers the 76ers.
Is it "virtue signaling?" Maybe. But worse announcers have gotten jobs for stupider reasons. I don't recognize any of these names outside Abby Chin, which is a pretty good indication that they got their job becasue they are good at it rather than just being a big name.