The graphics aren't why they're skipping this section. However, I'm looking forward to seeing more of this.
I don't know what the "proper" thing to do would be on Peragus. I have toyed with a Griff cameo on Peragus, but I really didn't like messing with the mood there.
It is a moody place. Just stretched out too much, too much backtracking necessary to accomplish the level without substantive payoff.
More variety in the droids that attack would be nice, but then why are there droids that aren't miners there...
Adding another living human NPC is problematic in multiple ways.
That said, graphical updates and artistic interpretations are always welcome here! I would ask you to think about mood in this endeavor, and look at past examples like A Darker Peragus