I think CGI has become digital crack for some directors. Jackson did a great job of hitting the right notes in the LOTR films. It appears to me that the Hobbit just kept expanding and getting more bloated as it went along. It seems to me that it would be lot healthier to start pre=production with the idea of throwing in absolutely everything the film maker wants and then cutting from there. The Hobbit would have benefited from a lot of stuff being cut out of the final script and then some more cutting in the editing process. It's when a film maker says they couldn't bear to cut certain things out and have the power not to cut them that red flags start going up for me.
I feel much the same way about NuTrek, even though I have great respect for Abrams' fillm-making abilities.