Average America hasn't heard of these D list celebs. If you look at 4 players on a show, and can't figure out who is the celebrity and who is the player, you have a problem.
Game-centric person that I am, I have less of a problem with not being able to identify the celebrity, so long as everybody involved is able to play the game competently. I've been watching the "Figure It Out" revival a lot -- I don't know who any of the celebrities are, but I've already been able to pick out ones I'd like to see return if there's another season. I can see the same thing happening with this show -- "I hadn't heard of this person before, but wow, they're really good at this game. I look forward to seeing them on a future show, regardless of their celebrity status."
Another way to make sure we know who the celebrity is would be to do like the original version did and always have the celebrity sitting camera left.
Having been in the audience for the pilots, and after seeing the above promo (which does appear to largely consist of footage from the pilots), here's my impression: GSN has been running episodes (and mini-marathons) of classic "Pyramid" for a long time -- long enough that even non-hardcore fans have some understanding of the game's intangibles. If a network is planning to mount a revival of a series it's been airing a lot -- a series that will likely still be rerun while the revival is also airing -- it would be a good idea to remain faithful to the original. Not a carbon-copy, of course, since you want the new version to be identifiable as being made in this decade, but play everything close enough so your audience (which apparently has made it one of the more popular classic series on the network) won't tune away because the new version is too different.