Draw Power-wise it is certainly outclassed by other and better options. But, it could still be interesting in it's own deck. Vileplume from Burning Shadows for instance, has a powerful ability for this meta that can only be used while it's active. Which Sandslash can make happen with it's attack. There are probably a few other Pokemon i haven' thought of that could work in this vein, like Wobbuffet from Generations. Guzma could still be a problem tho.
If you have at least 2 Sandslash in play, then you can play Mallow to deck-stack any two cards you want and then draw them with it's ability. Alternately, a Sandslash powered up by Professor Kukui and a Choice Band can 1HKO most water-weak GX/EX's while only giving up 1 prize in return.
Not optimal, but interesting and potentially viable. Best of luck!