I think it is still free will on a most basic level.
Everything we do has consequences.
If we chose to leave or stay the choice is ours, the consequences of our actions change.
I think the issue is that the JWs brainwash it's adherents to "choose" what they are told to.
I think it's ironic that this article could mean different things to different people and may lead to some "choosing" to question doctrine. On the surface they've been given permission in a sense.
I plan to quote from it profusely next time my very in JW wife questions me :-)