I'm not rooting for it to fail, I'm rooting for it to be better.
And no, I wouldn't call it selfish. The fact that some people (not necessarily everyone) see California Grill as dated and underwhelming makes it likely that the idea of change has crossed Disney's mind as well. I respect that many people like it, but who's to say they wouldn't like a new restaurant with upscale food even if it's no longer called California Grill? Like I pointed out, California Grill wasn't originally there. A lot of people loved the previous concept, and a lot of people love California Grill. Citricos also replaced an older restaurant, and a lot of people love Citricos. I don't see 90s-inspired California fusion cuisine as timeless (in comparison to, say, a New England steakhouse, an upscale Mediterranean restaurant, a 40's-inspired re-creation of a Hollywood icon, etc). In a place like Disney (where rides, restaurants, and even resorts have gotten name changes and re-themes over the years), a restaurant replacement doesn't imply failure. It's just progress. I accept the fact that other people have fond memories at California Grill; so do I. But a change in name, decor, and menu, if (for the better) could be a positive thing. Just like the rest of Contemporary's refreshment (sleeker room design, The Wave, lobby refurbishment, etc) has been a big success in updating the resort's aesthetic.
I don't value my opinion above anyone else's. I value my right to have an opinion and not be blasted because it contradicts the status quo or majority view. I won't cry if California Grill isn't replaced. But if it's replaced by a concept that doesn't worsen the food à la Cinderella's Royal Table, then I'm in favor of the change.