The visions are still up for grabs. I was planning on keeping them, cause both have added Obi-wan dialogue to help drive Anakin futher away from the Jedi and better help to explain his fall.
At the start of the movie Palpatine gets Anakin to give into his hatred when he kills Dooku, But then he's pulled back away from Palpatine by his feelings for his master. Palpatine sees this. So then the visions can be seen as a tool of Palpatine. Placed into Anakins mind to get him right where he needs him to be.
I wasn't planning on relying mainly on the whole "I gave into the Dark Side to save the one I loved" angle. It's more along the lines that Anakin feels that the only one who understands his frustration and that he can really trust is Palpatine.
The visions help promote the idea of distrust in Obi-wan from Anakins point of view. Which helps better explain Anakin's hatred for Obi-wan in their final showdown. Without it, its just. "OK, I'm a Sith now, and I have to hate you, because thats what us Sith do."
After watching the visions with the extra dialogue from Obi, a few of the conversations between Anakin and Obi-wan seem different. The looks that Anakin shoots Obi sort of say "What are you plotting, old man?". And they also help explain why Anakin wont go to Obi-wan for help.
But like i started this post saying. This part is still up for grabs. So I'll give it some thought.
****Edit. As I was typing this, Bingowings pretty much summed up what I was trying to accomplish with the dreams. lol
And yeah, the second vision is worse than the first. this one just lays down the tracks." ****