Why would yearly downloads need to be limited further? I almost never hit the download limit but I hate having to think about it or having to make sure I download things regularly. I also don't want to stream for various reasons and have been continously subscribed for years btw.
I guess it won't effect me personally since I'm already subscribed but still. If your drive crashes or you have been on holiday for a while and you need to download a little more than usual, I think that should be possibly every now and again on a yearly sub.