It actually boggles my brain that people post stuff like this. Go do the Goblin starter zone and tell me about how WoW lacks quest variety. SWTOR has variety in a vague sense of motivation behind why you're doing the quests, a tissue thin veneer to hide your real motivation: leveling and gearing your character. In WoW, you put on rocket boots and fly over a field of zombies and burn them to death, blow up a thousand foot tall tree with a giant bomb, explore tombs in Uldum with Indiana Jones, stealth around Redridge with John Rambo butchering orcs.
As long as we are conceding MMOs to be in the arena of single player storytelling, I'm going to go out on a limb and make a claim: WoW's open world phasing is the single greatest achievement in MMO development history. It makes the MMO experience almost immersive, aside from the fact that its a bit janky sometimes. It can have negative effects on group play, but group play in SWTOR is practically nonexistent, so that's OK. Phasing allows you to feel like the things that you are doing actually matter. It allows you to participate in events in places where it would otherwise be impossible for events to occur. Compared to walking through big green doorways, it is essentially completely seamless.
WoW has variety in what you actually see and do in your questing experience, not in the pre- and post-quest rundown. Yeah, it still has its fair share of kill X of Y quests, but the monotony is nicely broken up by quests where you actually do interesting things. On extremely rare occasions the writing of the story hits high notes in SWTOR, typically at the culmination of each act for your character, so 3 times across a hundred hours of playtime. The majority of it is pointless contextualization for mundane tasks that takes itself way too seriously.
WoW has a lot of quests whose writing actually makes me laugh out loud because its a running joke within itself. The Harrison Jones and Belloc Brightblade rivalry that persists throughout all of Uldum is a good example of this. When Jones blows himself up while hiding inside of a treasure chest, a wonderful little call back to that delightfully retarded scene in KotCS. When the Dragonmaw Warchief kicks the Horde emissary into a fire and yells "THIS IS DRAGONMAW!", when I kill a warlock for a quest titled "Throw it on the Ground" and break his soulstone while yelling "I'M NOT A PART OF THIS SYSTEM", I laugh and enjoy myself.
It contextualizes itself in a way that makes it a fun parody of pop culture rather than trying (and failing) to make me care about the mundane trivialities of a poorly fleshed out digital world. It has a sense of humor instead of the asinine faux-darkness that permeates most of the cheesy Sith questlines throughout SWTOR. I could go on and on about its shortcomings as a game and not an interactive story, but the fact of the matter is that SWTORs quests have no gameplay variety at all ever. Maybe only ~20% of WoW's quests offer something unique and different, but its still a fuck of a lot more than 0% of SWTORs.