Post sums up Chessington 2015 very much,
In the 90's & late 80's lots of care & effort were put in to the park and was a magical place.
Then in the 2000's things started getting half done on the cheap and weren't as well themed, in addition once grand theming decayed or was eventually removed altogether.
The 2010's then which brought some hope in the form of Wild Asia, but then the decline has continued as more once great theming was neglected becoming worn and tired before being completely removed & unreplaced (falls, vampire, ramesis, tombs & mine train) whilst once immersive ( neglected) level queue lines are being culled for cheap cattle pens & there is a general 'only fix or update this if it brings guest & money attitude).
The accommodation & other activities have improved noticeably but the rest of the park hasn't kept in line with this looking worn, tired & forgotten, not being a patch on its magic making days.