My jaw dropped open when I first opened the park. It's just massive. I didn't try to figure out the size but Metro says it's about 220. I believe it. A very ambitious project to say the least.
The open space didn't bother me. It's a large park and having areas that are only landscaped is inevitable.
From my perspective there were only 2 negatives in the park. The first was the pathing and organization of the park. If you look closely at the park it's divided into 2 sections with only a single 2-3 wide path connecting them. It would be very hard for the peeps to move around and get to all the sections.
Second was that it was started a long time ago and some of the architecture is a bit dated by RCT2 standards. Don't get me wrong -- the architecture is still very good. It's just less "Wow!" now than it would have been last year.
Everything else was very very good. The coaster layouts were all very good and were well integrated with either archy or landscaping. Each themed section was well done for its intended theme. The landscaping, including the open spaces, was also well done.
Lastly, I don't mean to get into a huge argument about this because it's a little bit of history now, but both times I had the park open for judging one of the coasters crashed. The reason it crashed was because it didn't make it up a hill just before the station. This is the reason you put lift chains going up some hills. They're for additional coaster safety -- not because of sloppy coaster design that requires them to get over hills.
Anyways, congrats to Fusion for another great park.