[The problem with that line of reasoning is that there's significant evidence that's not going to happen. If the older series were going to provide a "strong showing", they would have done so already. I think this is more a "be grateful for what we have" situation.
Oh, make no mistake, I don't believe that Eubanks CS' drawing 400k viewers is going to lead to a double run of To Tell the Truth 1980, 7 days a week at 5PM, or something as near-absurd. But
everything about this scheduling move reeks of a new programming head coming in, seeing what they currently have, and wanting to see what can work so they have some idea of what type of programming to run and to invest in.
If, when the changeover happens, the classics go out and perform poorly while Baggage and Newlywed do 400+, then that's what you'll see on the network. If suddenly Richard Dawson and Gene Rayburn generate huge viewer totals in primetime, it's going to make any programming head worth their salt more willing to invest in those and similar shows. Likely? Heck no. But it's been several years since any of the older series have really been even
*tried* in prime time (They did a run of late-prime Match Game 5 years or so ago, and Family Feud on Sundays a few years back that were in prime on both coasts, and the 2008 NYSI/Trivia Trap hour aired in late-prime on the west coast, but it's been a while on them all) so at the very least, it's a shot.