Creeping Socialism
Back when TCAS was developed, pilots were insistent that the TCAS not be a command, but an advisory, hence, Resolution Advisories and not Resolution Commands. Now you say it's going to be automatic. Uh, oh; Big Brother is taking over.
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I was involved with an accident investigation in which an FA was injured. The 757 was at 18,000 feet on descent when ATC alerted the pilots to oncoming military traffic 1,000 feet below. TCAS then issued a TA, which was followed by "Whoop, whoop, Pull Up!" The startled pilot hauled back on the yoke and dumped the FA.
TCAS was not at fault. The #1 Radio Altimeter momentarily sensed the fighter below, and ran its indicated altitude down to 1,000 feet. The GPWS jumped on that and issued the Pull Up.
Sundstrand had issued an optional service bulletin to add some filtering to the GPWS warnings, which would have avoided the incident, but the airline had a policy of refusing to pay for optional bulletins.
GB