Problem is that Idol production realizes that the singers really aren't that good enough. At this stage, they don't want to let contestants sing hard songs and do a bad job at them because that will only prove lack of talent on Idol's part. So now they give them easy songs that get the crowd going that way they can maintain an impression that the contestants are really just that good, which is of course not true.
The contestants always sing better when there are musical mentors around, I hate how they've totally stopped that. Movie promotions can wait until the elimination episode or something. Also, I think the best performances come between Top 10 and Top 5. Everything before Top 10 is ridiculous and everything after Top 5 is a joke. Between Top 5 and Top 10, the contestants put their hard work and life into their performances. After Top 5, the contestants as well as the production know that the audience already has their votes and will vote no matter what.
If this was American Idol, there should technically have been two eliminations today. And because of that, contestants should have sung their heart out today! But performances seemed half-hearted in today's gala.