hi donni bit of personal reasoning but thats all it is, none of your conclusions are anything other than personal speculation.
I agree that my synopsis on why the name is not in the NT is speculation, but so is the insertion of Jehovah 237 times in the NT without one shred of any 1st or 2nd century Greek manuscript to support it. The divine name booklet comments that Matthew wrote his gospel in Hebrew and most certainly used the name and this is also speculation.
I do not see how anyone can see that we have scores of very old OT manuscripts that have the tetragrammaton that predate the NT by several centuries, yet believe that Satan succeeded in making sure it was not preserved in the NT. I don't have all the answers to these issues, but I do know that the name was not in the NT because of all the hundreds of 1st/2nd century manuscripts/fragments that exist today and we find more as time goes on.
I also believe the name should be in the OT translations because the evidence supports that and to replace it with Lord is the same as replacing Lord with Jehovah the NT.
Donny