I agree lowering the base ticket price is a bit problematic. However, there are other ways to provide "financial incentives" for those who go to DHS to gain an attendance boost. They could send coupons to your
MDE account when you're in the park (20% off a meal at a DHS restaurant, a couple of free Mickey bars or other "snack" eligible items, merchandise related coupons, etc.).
On the experience side...I'd flood the park with lots of character meet & greets -
particularly with normally very rare characters - but not under any kind of schedule. They would come out randomly in various and random spots. So you'll want to be there, walking about the park because you never know who will appear and when. In today's instant-notification, social media world...it will not take long for word to get out and generate a buzz.