Quartzis is....okay. Sableye still has more style, despite not looking as badass. Diador is just ridiculous though.
What Pokemon do you guys wanna see? I'm hoping mostly for a giant squid. A narwhal, sea urchin, housefly (I don't like them but I think they need a Pokemon), and some other stuff would be nice too.
I think they should add more double-typed Pokemon. (Like Palkia, and its Dragon/Water type.) Oh, and they should add a Dragon/Ghost soon. And maybe add a Diamond-typed Pokemon...that may be going overboard, with the new types.
On a more serious note, removing a type would cause a far more drastic shift in the metagame than adding one would. Imagine, Rock/Ground types bein' useful since the other type was removed. Aside from (possibly) boosting the effectiveness of said dual types, it'd completely change how Pokemon like Tyranitar and Swampert are used, depending on which type goes.