My feeling is that turf has been slowed down again this year. Between the slowing of the surface (cutting of the grass higher and increased density), the heavier bullets and whose diameter has been increased a little, it is not surprising to find players like Pella, Bautista Agut or Goffin and Nishikori in 1/4 of Final.
By these provisions Wimbledon signed the end of the big waiters (only Querrey survived until the quarter final stage). Volleyball servers having long since disappeared. It's a shame to kill the specificity of a surface.