I don't think what happened at CRT would necessarily affect other restaurants -- that is a unique situation.
Le Cellier has to compete with all the other World Showcase restaurants, so raising their prices dramatically would result in an equally dramatic drop in demand. If you're thinking that Le Cellier might "go princess", I think that is very unlikely with Akershus already doing princess meals. Concerning going to 2 TS credits, that also seems unlikely as Coral Reef, which is more expensive, is dropping from 2 credits to 1 as of Jan 1. They seem to be requiring 2 credit for dinner shows, "signature" restaurants, and "special" meals like CRT. I can't see Le Cellier being designated as "signature".
Remember that CRT has experienced for several years an EXTREME imbalance between supply and demand. They increased the supply by providing 6 princess meals, and even that didn't help, so now they working on reducing the demand. Le Cellier is popular yes, but the difference between supply and demand is nothing like CRT.