I'm hoping that the lines will get shorter as well. Anything to take lines away from the coasters is good in my opinion.
^Keep thinking that, it propably will not come true. Sure the lines might be shorter when it is hot, but there will be more people going to HP since there will be a water park.
This is a good move for the park. People will now be able to enjoy a whole day at the park. Families with teens and young kids can drop the young kids off at the water park, and the teens at the amusement park.