I've also had a chance to ride the new rides at Funfields. So here are my reviews.
The Voodoo is the thrill ride that the park desperately needed, and it does not disappoint. Don't let it's small size deceive you, because this ride delivers some surprisingly strong forces and hang time. The ride cycle time is perfect, with 2 full inversions and a 3rd inversion that is very slow....resulting in some loooong hang time. It's a pocket-rocket of a machine. Also, the harnesses and seats are comfortable. IMO it's better than Doomsday Destroyer, Pandamonium and Tailspin. However, I still prefer The Claw's shear power and intense airtime over the Voodoo. The ride also has some great theming and queue atmosphere. This is now the best dry attraction at the park.
With 2 people the Gravity Wave is a little underwhelming, but with 4 persons.....wow what a slide. The beginning s-bend is a gentle, yet fun beginning; which lulls you into a false sense of security. Because what follows is nothing but gentle! The downward helix, the steep drop, and then the wave are an intense series of elements which took me by surprise. IMO this is best water slide I have been on, and is the best slide in the park. It’s also a really nice long waterslide. A must ride with 4 persons.
Both are excellent additions to the park, and as @Andy G said, it's fantastic to see Funfields continue to expand. I'd love to see them add a family raft slide off the Gravity Wave tower....perhaps a 1/2 open, 1/2 enclosed mammoth slide.
Love to hear people's thoughts as to what Funfields should add next.