I'd have to see all the deleted scenes to determine what I'd add back in. And they won't be available til the Blu-Ray.
I know I'd put back the crew meeting after the first expedition, and probably the alternate version of the Shaw/Holloway scene. And I guess the longer Vickers/Weyland scene. But a lot of stuff from the first dump online was also extraneous and not really needed.
I might check out the Weyland Investors cut for giggles. But I was pretty happy with the film as is.