I can only speak to what happened with their sister channel Fox Business.
In the beginning, Jenna Lee and Nicole Petallides had an early morning show and it was nice. Elizabeth MacDonald and Alexis Glick for a time joined before the trading day began.
Also of note, the first two plus years saw a show where Rebecca Gomez slid over from FNC to a New York City bar one hour after the trading day ended with Happy Hour. That show was so much fun and featured many jam packed segments--never was a dull moment, even during the Friday before the Oscars where we would see her film a few taped segments modelling red carpet dresses.
Cheryl Casone has been a mainstay and is still there today.
However, it was Liz Claman that changed everything on the very first day in autumn 2007--this happening a short time after leaving CNBC. Whether it was in the studio, or on the road visiting CEO's from Meg Whittman then of HP, the late Paul Ottellinni from Intel, Warren Buffett, and the early days of Elon Musk running Tesla was must watch TV. Sadly, the leg shows mostly disappeared by late May 2015.
I also recall Lori Rothman appearing off and on in the early 2010's, and later in the decade saw Jo Ling Kent before she left for NBC.
Even Melissa Francis and later on Trish Regan arrived from CNBC and Bloomberg, where they both contributed in the late afternoons and prime time with some success. That was, until there were some things that they shouldn't have mentioned on the air in 2020--which ended up costing them their jobs.
A few years prior to the pandemic, Maria Bartiromo appeared ocasionally in the same chair Liz made famous for years.
But since the pandemic hit, it is mostly about Liz sitting inside her mobile truck at home doing satellite interviews right and left. However on her Twitter, it is nice seeing her dog Rosie roam around her living room
or showing us the rather peculiar view outside her windows
People like familiarity and there aren't many people left. The ratings prove it. And the last time I watched FBN on a regular basis was in early October 2019--when they changed their graphics, which are extremely difficult to read since their numbers appear way thinner than the bolder, easy to read graphics they had for almost a dozen years.
But I agree with you, PaulH on one point. Once the pandemic is mostly contained--Fox News will probably take advantage again with their studio window. The bigger question is with FBN. Will they do a studio makeover, or will they keep using the desks as is?
Clearly, it won't be the same again and to me is very sad.