The argument holds up just fine, BECAUSE its PART of his character!!! Its not me making some fluff reason I'd like him to quip more, I'd like to hear some more sharp one liners BECAUSE that's what Spidey does! Its part of himself. Like with Bruce Wayne, Batman fans wanted to see Waynes detective skills, which were not really shown off in any film, until the Dark Knight. The earlier Batman films (B89, Returns) were still good films, but as most fans said, they lacked certain elements of Batman/Bruce Waynes personality, as found in the comics, which is where the movie was based on.
Perhaps when I was younger, I watched the SMTAS too much. I still enjoy that show greatly, and maybe that influences what I'd like to see out of Spidey in the films. Going back to the point of this thread, I think thats what Vanderbilt did, more of a Spiderman/Parker characterization from the comics, and since that flies in the face of most of what Rami and Parker had Peter/Spidey do in the films, he was ditched for their own writer, now that they are back on board.
You have a valid point, but as James Cameron talked about in his script, you could off set this with cleaver lighting, or possible alterations in masks, some very subtle, but enough to display emotion.
Talking about the mask not emoting, check out the scene in SM2 with Doc Oct's experiment. What the shots of Spiderman in that sequence, like when he saves Harry (almost looks pissed and frustrated at Osbornes attitude) and especially after he pulls the plug on the machine, and looks back at the empty space the experiment had been in....... that mask in that sequence emoted more to me, than anything Tobey could have done.
Again, this is all in my opinion!