Millie, I'm not sure I understand your questions as they seem to be asking different things.
Let me take them one at a time:
doesnt that have the potential to be stabbing themselves in the foot?
Well the WTBTS and their leaders are always doing that, aren't they. They don't really know how to motivate, but they do know how to manipulate, so that's what they do.
Less men reaching out?
This is always a problem in pretty much every congregation.
When I was an elder, I always wondered why so many long-term "brothers" simply coasted along at the status quo and wouldn't "reach out." Although they didn't seem content to just coast, they would never "do enough" to be appointed as a MS or elder.
Now I believe it that they actually do NOT want to be actively involved. Probably they have serious doubts, maybe they don't believe any of it at all, but they are not willing to take a stand and quit the religion. I'm sure it's usually the family pressure, but likely most of them have not sorted through all the psychological manipulation and control. They simply know they just don't want to do it and are ok being labelled as "spiritually weak" as long as they don't have any "responsibilities" in the congregation and they aren't getting disfellowshipped. It's JW limbo.
Is the new light on brothers not being MS =not being marriage material going to be enough of a carrot to counter the general apathy and lack of reaching out?
I doubt it. It might work on a few individuals. The WTBTS is forever making silly little rules and then saying, "But we aren't making a rule about it!"
Let's review: It's a cult!