WLS-FM adopted the classic rock-lite format when The Loop went away. However, the classic rock-lite format is increasingly becoming more of the default for classic hits stations - look at WOMC/Detroit, KOOL/Phoenix, KRTH, WOGL/Philadelphia, etc… you’ll hear Prince, Cyndi Lauper, Bee Gees, Michael Jackson, etc but not most of the cheesy 80s pop or late 70s disco. It helps lower the demos since classic rock has shown to do well in younger groups.
Musically, I think 94.7 is really in the best place they can be. They’re never going to be a massive success like KRTH or CBS-FM with the current forces in the market.
Second time actually. About a decade ago when Jan Jeffries took over programming, they removed the vast majority of 60s music and almost all pop. Was generally more downtempo. Presentation was dull as a doornail. The DJs were barely allowed to talk. After he left, they slowly went back to being more pop-friendly but it was still more downtempo. Before the Jan Jeffries era, it was comparable to Me-TVFM, just a tad bit more uptempo. After Jan Jeffries, they reverted into a more mainstream Classic Hits format but it still had a lot of downtempo music. They eventually started doing "No slow weekends" with all uptempo music. And yep, they went back to a rock lean after The Loop flipped. Wade Linder was shifted over to 94.7 after The Loop went away. These days it seems like a higher energy, mostly Rock-based Classic Hits format. WLS was rock leaning in the 80s, I think they're trying to capture that for some listeners.