Only 3 per day though. I too have only been able to go in the summer or right around christmas, and with planning, early mornings, and fast passes, I had little complaint. But now with this only 3 per day rule...I think it's going to be much more difficult to make a really busy day do-able.
I don't know that we usually used more than 3 per day on most days. And having them set-up in advance will keep me from having to run cross park to get them. Most days we could hit 3 major attractions before the lines get above 20 minutes, then 3 to 5 minor attractions before those lines start building. With the new FP+ we can spread out our other 3 attractions through the afternoon or add them to the later morning. We are usually out of the park by 2pm having completed 10+ attractions. I don't think that will change and my feet and legs will be thankful for the change.