Guy's Grocery Games isn't a take on the original Supermarket Sweep. Other than being set in a grocery store, they don't really have anything in common. The finale of GGG is a bit like the finale of SS (moreso since they changed the concept of the final run on GGG in recent years) , but at the end of the day GGG is a cooking show.
I agree that there's something missing from this version. I like Leslie's enthusiasm and that she's a fan of the original. It definitely adds to the energy of a show (contrast with Joel McHale on Card Sharks who's clearly just there for the paycheck). Still, she could take it down a notch. It's a gameshow, not a bit on SNL Weekend Update. I don't like the Security Guard, Cashier, Barista or Flower Guy. They're not a huge problem, but they're a distraction at best.
The main problem seems to be in the gameplay. There are so. many. bonuses. I know that original kept adding more and more bonuses opportunities but I think it was detrimental there too. They spent almost all their time on them gathering their bonuses and none on getting the groceries. I also don't like the change that the can drag their inflatable around with them. In the old version, you had to pick it up and immediately take it back to the register. The other problem, as, mentioned above, is the commentary on the player's shopping. You need a play-by-play of what they're getting and why, not Leslie riffing on them. I feel like this is where her enthusiasm works against the show the most. They need an announcer to do this part,
For some reason, the show seemed to have a lot of filler. The contestant interviews seemed to go on forever and there just felt like a lot of fluff. I thought they were drawings things because they were going to have an extended bonus round like on Press Your Luck, but when it ended up just being two half an hour episodes I couldn't figure out why it seemed to drag compared to the old show which had the same run time. They same to followed the same formula of gameplay.