The outisde marketing and psychologist sounds more like a consporacy theory to me, but I would say they do hold a "marketing" mentality with all these changes. Just a few days ago, my mother told me that when her Field Service group met, the Elder taking the lead read a Kingdom ministry from last year, saying that the focus has been moved more from preaching door to door, to public places because more people are being found outside than at home.
To change the Blood doctrine and 1914 within short periods of time is way too heavy. It's like their two signature doctrines. If one were to change, the other would need to happen much after.