A simplistic view from somebody who does little aeroplanes for a living.
We routinely on light aircraft designs fit the back ends with sacrificial skids or in extremis wheels that aren't intended normally to be used. Whilst without a doubt it's better that the handling qualiteis prevent a tailstrike, if particular airliners are known to have a finite risk of this, I can't see why such a feature need be particularly heavy or expensive? Hey, you can probably persuade the airline beancounters that it'll pay for itself by shifting the CG aft.
I think perhaps though this should be an "as well" not an "instead" precaution.
G