Absolutely, this needs to be done ASAP. I hope that the pilots’ and flight attendants’ unions are pushing this hard. No one should have to go to work and be worried about being assaulted; and being in the air with limited options for assistance just makes everything much worse.
I don’t understand what’s taking so long in setting this up. The airlines seem interested in doing it, maybe they (or more likely their lawyers) are worried about the liability issues.