Claydol > Uxie.
Sorry, why does Claydol have problems with being sniped and Uxie just magically doesn't, Papi?
So what if it's Roseanne-able? It's crud! So you get one shot at 7 cards? Big deal. Claydol consistently gets you 6, and you get to put up to 2 cards at the bottom of your deck before you do so. Uxie Lv X is worse than drawing 2 cards. Claydol gets you about 3 every turn. And plus, Lv X, albeit a basic, is annoying to get out, because it has to be active.
I'm sorry, I just don't get the fad. You can argue that Claydol might die out, and you could easily be right - But I don't see how Claydol fails and Uxie doesn't.
What would replace Claydol? Draw power trainers. Chatot, Jirachi, whatever are nice, but you have to attack with them. Claydol you don't. It's like comparing an apple with an orange. The ones that attack have better effects, but they take up a turn - Replacing something with something that functions completely differently seems strange.