I find this topic very interesting and I am still digesting the info - but in my opinion the JWs memorial was strictly a corporate decision. I think maybe us out here are trying to explain JW doctrine when in fact they are all about the money and membership. I think (we) give the JWs way too much credit. They are just a bunch of money hungry men preserving their posh lifestyle in the East.
I read that years ago the group of annointed got tired of the same small group meeting once a year for the passover meal. So they invited the "great crowd" to WATCH them partake. It resulted in more donations, and a valuable recruiting effort because of the memorial talk.
I just think JWs need to see what their religion is - it is just another corporate entity wheeling and dealing for money, tax free real estate, and scamming innocent people out of their hard earned money.
Other religions seem to accept all people who want to believe in Christ and be taught the bible. I always remembered enjoying the Catholic services as a child until my parents changed over to JW and the torture of us kids began and the isolation from other people.