What I dislike most about most TV stations' approach to design is their unwillingness to be different and to take risks. If something is not consultant-approved these days, it's essentially off-limits as far as most stations are concerned -- and this shows on the air.
That's why I really like what TEGNA is doing. And, yes, 3D graphics *can* also be elegant, but I surely haven't seen too many examples of that recently.
I don't necessarily believe there is one right "look" for TV news - it all just depends on the message the brand is trying to convey. There can definitely be sophistication in 3D - and 2D can look super tacky (see: TEGNA.) It comes down to process, development, and execution.
Franceinfo isn't completely my cup of tea, but I don't necessarily think it's a bad design.