Here are the biggest things to me and you'll have to decide based on your plans what you want to do.
Benefit #1: You're not tied to restaurants in your chosen park. We often would find that we could only get reservations we wanted in a park where we didn't really want to spend the day for some reason (i.e. it was an EHM park that day). This makes it much easier.
Benefit #2: Makes evening entertainment much easier. If I want to see fireworks or Illuminations I can jump over to a park just for the evening (this was even more important when we went during times where things weren't every night).
Benefit #3: Gives more flexibility to go do certain crowd-proof things during the hours you want. (For example, during Food and Wine we'd want to make sure to get a few trips to World Showcase but didn't want full days there).
That all being said, it does take time and energy to hop. With 8 park days you'll probably not need it as much since you'll have a lot of flexibility and opportunity to do all you want but also gives you more opportunity to go do more things you want to do again as you get further into your trip.
These are all very good points and are the reasons we use Park Hopper. Its one of the little splurges that we budget into our trip. We love the flexibility of eating at restaurants outside the park we might be visiting on a particular day. We find we do most of our dining in Epcot and the Park Hoppers allow us to do that. So very good points for the benefit of Park Hopping