It would be nice if Physicists could figure out how the action on one gets the information tot he other, but so far we haven't figured that one out. ... BUT we will.
“You mean you haven’t figured out how to transmit useable info.”
Well, I mean, under our current understanding of physics, it is impossible. You would really need to come up with a different model of physics to make it even appear possible, and at that point, you are dealing well beyond a simple hypothetical “we haven’t figured it out yet” scenario.
“The very fact that action on one effect the other regardless of distance between them means that a communication exchange can be exploited, if one figures out how to array and read the changes at either end of the paired particles.”
It’s beyond that. The observer effect is a real physical effect that has been experimentally verified. It happens no matter what method of observation we attempt to use. We may not understand exactly why it happens, but we can’t pretend that it does not. So, unless you can get around that, it won’t matter how you try to “read the changes”, it will have the exact same effect of garbling any message you tried to send.
Now, scientists have come up with methods to use this to communicate, however it doesn’t allow superluminal communication. At best, it functions more like data compression, as it requires a superluminal and subluminal packet to be used together. The subluminal packet can be small, and unlock a larger superluminal packet. Yet, you can’t unlock the superluminal packet until the subluminal one arrives.