My only real issue with the movie costume isn't with the costume itself, it's that all the promotional materials, toys, w/e, seem to think that since the black webbing is reflective, Spidey's webs are white.
They're BLACK.
One thing they do change a bit each time is the lenses. Not the size that I can see, but what's in the white portion. They're just flat white in the original, then they are textured and slightly tinted in SM2, especially in some of the CGI close-up shots (first time his webs don't work). They look similar to that in 3, but they were different. I forget exactly how.
I wouldn't change the shape really, but I always did like how Scarlet Spider's lenses had a different shape. It was kind of like the one they're using, but larger and the smaller 'nose edge' was longer and more curved.
There were many variations of course, but there's some cool eye designs out there which would be fun if they ever go down that road.
What WOULD Scarlet's outfit look like, if done by these guys? Hmmm.
Following Raimi's path so far, it'd prolly be an all-red version of that web-kink-suit posted above.
-Vaportrail