Ocean Park have really taken advantage of its supreme locale. Look how green and beautiful when it was in the 80's, everything clean and tidy.
The new expansion is a great, glad that they went for B&M for the new major coaster. But the new theme areas are too packed and messy, like the first part of Hair Raiser which goes to the back of house of the Polar Adventure, quite unsightly indeed...
Btw, they are planning for a second expansion at the area further down the mine train (formerly known as Middle Kingdom), including a waterpark consisting of both indoor and outdoor parts, and 2 themed hotels. Looking forward.