I think the discussion centers around the fact that it 's almost impossible to be "good" when the producers seem to be more concerned with having a diverse cast than actually writing good plots for them, and believable character development.
Then there's the issue of attempting to reboot a series that already has a great deal of prior character development. That's always problematic.
I think it is perfectly fair in this context to point to Star Trek TOS and the push for diverse characters to show that doesn't actually preclude a good show- especially consider that for their time. On the contrary, I believe because the show was not a box of saltine crackers (and not just based on race but not having all the characters be cookie cutter replicas of each other in many ways), is why it had staying power.
As for prior character development, we are so far past the original series and reboot movies, the only ones who will care about that will be the extremely obsessed sci fi nerds who would bitch about anything anyway. If done well, this will have a new audience and a new fanbase. Think about the new 'grittier' Superman and Batman that diverged from the look/feel/character development of their counterparts.
