I am not having any Shop Wiz lag, but I think I know what you mean about this recent game-room-revamp-lag. I noticed that the game room, ALL individual game pages, and my Favorite games page did the same thing. When I click to open a page, my whole browser lags for 1/2 a minute so that I cannot click on anything else until the game page is loaded. It is extremely annoying!!!11
Now I notice last nite that my Favorites page loads fine and fast, but everything else games-related is still a pain to navigate through. I noticed it doesn't matter if I have scripts and Flash off, either. I don't know what the heck they have embedded in the pages that is so bulky, but I wish they never changed the games room anyway. Everything is LESS organized to me, with more categories. I don't even understand their wish to make things more fancy, if that is what they were trying to do. The games room was fine before, in my opinion. And I miss the easy game feedback popup.
Now it just redirects you to the bug report page.