Have you considered alternating signals using different radio frequencies? And then use differences in signal arrival times for more accurate location? Also I guess using different bands might be more universal, as signal loss would be different depending on environment and band used.

I have not, yet. Right now, it's more of a "signaling life" tool.

Improvements are definitely needed with location, but the signal loss as you mentioned is higher priority and restricts what can be used for location.

I'm planning to do my homework about alternatives to help mitigate the signal loss. And from there, the options for location might be clearer.