It's hard not to notice the decline when you listen to her soundtrack from 2000-2009 and 2010-2018 back to back, at least it was for me. Almost nothing in her more recent tracks (especially after Madoka in 2011) came close to her wonderful works in Madlax, Noir, El Cazador de la Bruja, Cosette, the Future Soundscapes, KnK, and Elemental Gelade. She still definitely has some brilliant moments though. Zaregoto is really good, Hanako to Anne is really fresh and so unlike Kajiura, Madoka movie 3 and there are some really nice pieces from the original series, but her works for more mainstream series like SAO, F/Z, and Erased left so much to be desired. The instrumentalization, the melody, the arrangement of both the instrumental and vocals on her works were much better in her 2000-2009 works.
I'm still pissed Kajiura is almost working only with FBM+Rie+Kido Kiyo on her recent soundtracks because the musicians play a great part on how a soundtrack sounds. Korenaga's guitar sound is VERY different from Susumu Nishikawa's. Nozaki's drumming is VERY different from Sato's. Also I am so not agreeing with her works all being rated in the 9s because SAO, F/Z, and erased are 6 at most :p