Yuka would be fantastic for Mao! They have similar strengths such as soft, gentle touch to the ice, wonderful steps, mellow, smily presence etc. Something richer, softer, and more nuanced can be added to her skating.
Although Yuka was not a very strong jumper which could be against Mao's focus, it's interesting actually Mao went to TAT despite TAT not being a jump coach.
Mao used to have among the prettiest costumes in 2006-8 seasons (Nocturne, So Deep in the Night, 2008 Worlds Chopin). Can she go back to them?
It's not a good idea to let TAT, Morozov, Yuka or any coach design costumes. With all respect to them, they are skaters and coaches, not fashion designers. Only the light blue SP costume with a bird in front from a couple of seasons ago was actually fab though. It was TAT's designing.