My problem with the pilot was that it was not a very good police procedural. Both cop characters seem to act totally unprofessional. The ex-husband cop seemed to constantly hint at some sort of consequences to the main character cop's pursuing the case, but why? I get that she's not popular, but his whole "don't look into this more deeply" thing implied that there was some sort of dark secret involved which ended up being absent.
And the bad guy seemed to miraculously recover from his gunshot wound just in time for lucifer to punish him. Not to mention that it looks like the police had no problem with lucifer just interfering with the case as he wanted.
It wasn't terrible, and it's only the pilot so maybe these things will get worked out in the future, but for now this seems to me to be totally skipable. At least both lead characters are charismatic and the totally gratuitous little kid was cute.