The actual movie dealt with a lot more elements like the Team X, Logan and Victor Creed's relationship but that doesn't mean that it has more depth than the Benioff draft.
You're partially right about one thing. Simply dealing with more elements doesn't mean there was more depth. Having more depth in dealing with those elements does. And the movie not only had more elements, but it had more depth overall.
There is more depth to Wraith, the Hudsons, Team X and Victor and Logan's relationship in the movie than there is in the script. It's almost impossible to argue against this.There's about the same amount of depth to Silverfox and Wolverine in the movie as there is in the script.
All the things they've added where under developed, they just over looked the whole Team X thing.
They make a nod to it in the script. We see it explored at least partially in the movie, and there are a few "depth" elements to it. ANY depth VS a mere mention is more depth in the grand scheme of things.
For instance, in the Benioff draft, we get a glimpse at Logan's military past when the adamantium is bounding to his skeleton. He gets those flashes about his past and all the nasty things he has done, it's simple but very effective: we get to see Logan empalling a man, William Stryker with a necklace of human ears, Logan setting a whole village on fire. Now, that gives me an indication that was one son of a b****. In the film, it's just fun, pure fun.
You seem to be confusing the issue. This isn't a discussion about which version is more faithful (even that is arguable). This is a discussion about which has more depth.
The script may have more "depth" in terms of Logan's animalism being explored (and again, even this is arguable, because he does show us his animal side, albeit not as darkly as the comics did), but that's really probably its only advantage.
Mentioning something isn't depth. Exploring it is.
Saying "Team X hunted mutants" wouldn't be depth. It would be a story point that is not explored. However, Having Wraith admit to what they did and struggle with what he did, after showing multiple members who have retired for reasons unknown, posing the question of "why" to the audience, is some depth.
The Team X is actually fun and Logan doesn't do much, seriously. He is just standing there and he does nothing violent or reprehensible.
I guess that depends on your definition of "fun". I don't find killing civilians fun. And luckily, that's not the only reason Team X is in the movie. Team X has a much darker purpose in the end. A purpose that, far as I know, isn't even hinted at in the script.
What I want to say is that the Benioff script compared to the actual film felt like less is more.
Except less wasn't more. It was less. Because in many cases in the script, elements that were at least explored somewhat in the movie were almost nonexistent.