I saw it back in September, and i am by no means a Les Mis expert, but i did like it, the only thing that stood out that i hated was the opening few bars(overture thingy since its so short), they were totally hollow and lacked all conviction that they usually have.
I thought the lighting was beautiful and yes, very saturated. I also thought it fit into the theatre quite nicely and loved the use of the boxes.
But looking at the marquis outside, one can easily see that it was not intended for a limited run, I doubt they would have spent so mucn on the marquis if it were just for 6 months, those things arent cheap and if you really look at it, the Broadhurst has up more adds than most other shows, and the verticals arent even say a cheaper vinyl banner but a solid sign, not to mention the large photo of Enjorlas that is cut to fit into the shape over the door. those things arent cheap.
http://www.flickr.com/photos/27199361@N08/ Phantom at the Royal Empire Theatre