WoW addon for MMO 7 is simple drag and drop for abilities and spell, so no need to do macros.
Dont worry idk what sensor the catz 7 use but knowing its an mmo mouse i dont think it will use top end sensor and the dark core sensor is more than enough for a slow pace game like mmo
yeah sensor in MMO 7 isnt the best but it gets the job done, i use it pretty much just for games that i need more buttons for like MMOs, small hands problems. And yeah i wouldnt expect but honestly no "MMO" mouse offers features Mad Catz has offered/offers. Mad Catz is pretty much only manufactures i have seen do something like that WoW addon i mentioned and other manufactures usually just slap a numpad to a mouse and call it MMO mouse, again numpad mices arent good to use if you have small hands and button clusters are terrible to use, side scroll is amazing for spells/abilities you use often.