Just a few things I noticed on my most recent viewing:
The program derezzed by Sark at the beginning in the light cycle game reappears as one of the blue bike pilots during the light cycle match with Tron, Ram, and Flynn. He is the first to be derezzed, when Tron runs him into the wall of the arena creating the fissure through which the three heroes eventually escape.
Identity discs do not necessarily fly directly at a target and back to the thrower when thrown. They might make several different attacks if blocked, and Tron's even makes a feint before derezzing one opponent.
(This was sadly omitted from Legacy
Regarding the notorious escape from the holding cell aboard Sark's carrier: Sark delivers Flynn and Yori to the holding cell through a derezzed, triangular section of the cell wall. (Possibly it's not actually a wall, but a force field.) Sark removes Dumont via the same opening. Later, while the carrier is derezzing, Flynn is clearly feeling around this same section of wall, now rezzed up (or with the force field active), when he says "Yori, the wall!" (or words to that effect.) The wall or force field disappears completely at the same moment that Yori succumbs to the process of deresolution that the carrier is undergoing. After Flynn restores her, they escape through the "door".
nameplate is clearly visible on the side of the MCP's keyboard as the MCP is derezzing.