I think my problem with Prime Directive would be that this is not simply TOS Trek --- it is a strange evolutionary offshoot of TOS, raised somewhere among the Galapagos Islands, where it has cross-bred with fanfic, old-school wargames, aliens from some other IP license, and various strains of non-canon continuity.
And these Klingons, for instance, are just going to be swarthy guys with rosy cheeks and a vaguely Soviet vibe. Not only will there be no Worf...there will be nothing of the culture and backstory we've seen developed since TOS. In its place...fanfic and extrapolation.
[Which may be brilliant, for all I know, but that sort of thing usually isn't.]