In theory, it sounds like a good thing, but I am not sure how it would be received. Combined with price inflation, existing prices will become the new off-peak hours prices, and higher prices will be the peak hours prices, which will be applied most of the time and become the new normal.
It may be perceived as another trick to hide price increases, just like it already happens with shrinkflation or decreasing the quality of the product. Of course, inflation of prices expressed in $ is not Wendy's fault. Either way, I don't care for Wendy's or corporations in general.
Cue the woke press headlines:
"Experts explain why eating early can improve your health and your finances."