Just referred to this post and article -I know it's old and you've moved past believing in God etc...but thank you for taking the time to point out all these scriptures.....
A few years ago, these same thoughts were going on in my mind - I noticed in scripture that most letters by the apostles begin with reference to God and our Lord Jesus Christ' - and I thought, why not to Jehovah and our Lord Jesus Christ etc.
Surely, if making Jehovah's name known was a huge part of the preaching work, you'd think they'd begin each letter, clearly to Jehovah or 'LORD' ....
But Paul and others consistently refer to God, they use God instead of Jehovah exactly where you'd expect 'Jehovah' to be the obvious usage....except in quoting Hebrew scripture that contains the Tetragrammaton - and NWT use Jehovah there.
I was out with a darling sister one day - full time pioneer, been to pioneer school etc - and after a study I shared some thoughts, using Jesus name, more than Jehovah's name, I didn't get weird or anything by the way - (By the way I noted she had sidetracked on some fairly direct questions from the 'study' as they didn't fit in with the study programme' )
I'll always remember she laughed nervously at some point and said 'alive! You sound like one of those happy clappy Baptist types!'
Actually, I'd simply followed the language format of the early Christian writers......incorporating it into our spiritual discussion, instead of saying Jehovsh every other word.
I know you don't believe - but I know you'll sympathise with my point.....it was really disturbing at the time!