I plan to come back before HotS. HotS unit appear to be a total fool to me. Warhound, a complete A-move unit which designed to kill everything on the ground (A bigger marauder). That is not Mech, if I like to A-move I would choose Protoss then. Mech is always bout siege tank. Just buff siege tank and forget bout Warhound. Tempest seems stupid to me too. I like Battle Hellion and Viper though