The fact that ML CEN 135.7 carries comms from ML APP 132.0 much of the time I agree is not conducive to aircraft in Class G FIA making calls & broadcasts.
Which is not the fault of ATC, as I said:
I also make the point that the retransmission situation is not the fault of ATC. Its the result of their having to deal with staffing & workload constraints imposed on them by Airservices.