Andy,
These new rules are for any ATP certificate. I would say it simply depends on the operator but having an ATP would open a lot of doors for flying in the future. Many companies require it for insurance. The written is not hard provided you have a good study plan. This late in the game probably Shepard Air or go to a 2-day course or something. But why not take it? Even if for some reason you end up not getting your ATP, this is a good move right now. I've been telling everyone to take it simply because if you don't know it probably won't happen. Sounds like the new rules are going to be cost prohibitive. Good luck with whatever you do!