I was exited for Sandman. It had the potential to be very good, good actors, good budget, decently long timeline, etc. Unfortunately it got "Netflix'd" and suffers for it. It's kind of bland and boring. Visually it's not very interesting and the music is alright but could have been lifted from something else entirely. Listen here [1]
The best comparison I can think of is the BBC's Johnathan Strange and Mr Norrell. Similarly fantastic source material, the show had a lower budget but is far more interesting to watch and that comes down to set design, cinematography, editing choice, etc.
It's like the Sandman production crew picked the safest possible choice at every opportunity.