I do know that the current system failed.
No you don't. You don't know what calls were made on the CTAF or if
all the required DTI was provided and acknowledged.
What I do know is that safety dropped markedly when "close-in" CTAFs replaced the bigger MBZs. Having to operate on two radios at the same time can result in comm overload is not good and, I believe, will be a major contributing factor in this accident.
In any case, show us the money.