You missed my point. Whether it be a western animation or done locally in Japan, a movie production requires more time.
You make it sound like TOEI hired Kazuko Tadano, a former veteran who did a wonderful job, to do a movie and expect the work done in 6 months.
No, of course not. It usually takes about 2 years with a few months of initial planning, which are in most cases prior anniuncment. Toei have this problem with Crystal - they announce projects and then start planning. As far as Kazuko Tadano goes she is just a designer so far. We don't know if she will be involved as animation director etc. And keep in mind they haven't lost 2 years on animation so far, but just doing nothing and taking ages on a script... They announced a project in Jan 2017 and by April 2018 they didn't even started that script. Plus this is Toei we are talking about. Watch some of their recent films.... They dont look like something that has been done with time and care.
Actually I did a quick check. Tadano's most recent works in 2007 and 2014 had her as designer only and not as animation director, which is actually the case in many older stuff. Usually character designer is animation director as well, and she was for Classic and R, but for Wedding Peach for example she was just a designer. So this might be her only involvment here as well.