The writing is the key problem with the newest Star Trek film series, and the worst thing you could do is put the people responsible, or rather one of the people responsible, directly in control. The director and cast is what really helped Star Trek (2009), which I did like. I thought the plot did have problems, but I could forgive it because I think it did everything rather well. It balanced story and plot points with references, and most of the references were in the background that only fans would notice. I think it was a difficult job which was very well done.
The key problem with Into Darkness is that it did what bad remakes/sequels/etc always do, which is confuse references with plot. Hell, the entire movie was just one giant reference to Wrath of Khan. There were useless scenes, the plot wasn't explored, the characters weren't explored and had no weight, none of the plot points had weight, and the list goes on. It was just "here's Khan" with very little else done to make anything matter because, again, it dropped references and confused it as creating plot. And I did find the social commentary hamhanded (if you're going to do something like that, either make it more abstract to make the point allegorically, or take it by the gonads and say "you know, this is a lot like when they had drones strike during the War on Terror"; either be abstract in such a way that the audience is removed from reality and then forced to realize its own actual reality, or make it totally direct in a way that confronts the audience). And I found that social commentary undercut by not having the gonads to have Khan be Indian; if you're afraid to tell the story, then just don't tell it and do something else. And it was a special effects popcorn movie; you're not going to get any social commentary when you've made it just that.
I watched Into Darkness with very high hopes, and they were completely dashed. Into Darkness was so bungled a film that it made me dislike 2009 Star Trek, which was a film that had won me over despite doubts; that's how powerful that suck-ness was.
So I really have no faith if Orci directs, whatsoever.