Upon further review, perhaps they aren't actually getting rid of the host screen...I see a reflection of a screen with stuff displayed on it in the mirrored floor (which looks like they decided to go with smaller reflective pieces...I seem to remember them being bigger).
If they're going with white instead of the reddish goldish color for the lighting I think it's a nice touch.
Question for our more observant members: when they moved production last year, did they simply strike the set at Lincoln Square and move it uptown or was it totally rebuilt? I was curious and I honestly didn't see enough of Meredith's last season to notice. Nor did I ask them (and why I ask now I don't know).