They did show TPIR reruns for a few years (even the original 1950s-1960s version with Bill Cullen), but can't get them anymore -- the company that owns TPIR apparently decided having reruns on GSN was detracting from the first-run episodes on CBS.
If they air them at night or on weekends, I don't see why it detracts (except to show that Bob Barker is far superior to Drew Carey). Plus you have so many people not home during the day anyhow to watch it. The show itself, except for the host, is basically the same now as it was in the 70s.
And yes, Jokers Wild would be a great addition. Basically a poor and dumber man's Jeopardy with a slot machine thrown in.