it looks faster than last year to me. Tokyo also looked pretty fast. Both Paris, and the WTF were quite fast last year. Halle is ok-ish. But your point stands more or less, it could all be alot faster.
WTF is not fast... it´s not slow as those asian indoors 250, but medium fast indoor court, Paris was last year dramatically slower from 2010-players complained it was to fast...
Considering the fact both Tokyo and Shanghai are decoturf - what used to be fast HC - they should play at leat like this, if not even faster, but in Shanghai´s case they have quicker balls - just switch those Slazengers at Wimby with this HEAD balls from Shanghai and we don´t need speed up grass and it will play faster for sure