For a hypothetical hour-long show, I tossed around the idea of bringing back a shopping round to fill time. Make it a space on the wheel valued at $2,500, and if someone lands and solves, then he or she can "buy" a few items from the "Sony Store" (a bunch of tech gizmos at center stage, think Brookstone-style setup). Maybe put a small trip up there and a few quirky household items; the $2,500 goes to the total, prizes purchased follow the old "once you buy a prize......" rule.
Then again, it's been almost 30 years since they offered shopping (not counting the gimmick in the late-90s), so it's prolly a faint memory to most people. Plus, even with additional puzzles -- Toss Ups included -- they prolly don't want prize copy eating up game time.