I'm a bit late to the party on this one. Went to Chessington recently and can't say I'm particularly impressed with Tiger Rock. This however is based on the fact that I much prefer the zoo/animals being in a separate area of the park entirely, and the theme park being a completely different part. I'm not really a whole fan of this whole idea of integrating the zoo. I've never liked Busch Gardens for the same reason. The whole Land of the Tiger area lacks theming, and the ride areas just look bare and sparse. I LOVE the new soundtrack in the station however, although this would have worked perfectly with the old Dragon Falls.
To me, it's still Dragon Falls, and always will be. The Tiger head over the final drop is far too big; a huge part of what everybody loved about Dragon Falls was the fantastic view for spectators. That has largely been ruined by the huge tiger's head covering the majority of the drop.
I would much rather the tigers had been added to the zoo section of the park, the whole Mystic East area simply brightened up, given a new lease of life, and Dragon Falls remain as it was, with the fantastic addition of the new soundtrack.
There are some new elements that I like, including the added lights/sounds in the tunnel. Although not executed particularly well, the thought of using the tunnel to create more of an impact is a good one. I just wish it had been thought about a bit more and executed a bit better.
Overall, I love the soundtrack and the attempt at making the tunnel more exciting. Other than that, bring back Dragon Falls.