DFing isn't changing. If you think it is read the Nov. '14 study WT (I think that's the one) where it says that we should think of DF'd ones (even family members) as having been executed by god. I can't think of a much more extreem view that they could take.
What this boils down to is money, and probably trying to keep people from getting their KMs on jwleaks or here (and eventually getting TTATT because of it, like what happened for myself and warehouse). Of course "We'd like to install marble tile in the showers at our new cult compound in warwick, so please stop ordering so many KMs because that's really cutting into our budget" doesn't sound as good as "we're oh so loving and want to extend an olive branch to the DF'd ones, so we're making the KMs available publicly"