Bro you forgot the most important about Malacath: prince of lies, deception and hypocrisy !...
Wait does that mean Susan was a constructed lie all along?!
PS: Molag Balls lord of *cough* Roooope! (MC watch out! XD!)
PS2: Image Luna during the Greymarch!!!
Sadly, I do not recall old plot well. But I do remember really well Daphne being... "ropy".
As for Bones, wasn't she dishonest with *herself* and hypothetical in the old plot or something along those lines? Seems very Malacath-y to me.
Tbh, I never was intrigued by her and pretty much the same goes for Malacath. Which is why, personally, this connection *feels* reasonable.
Also, I must say, girls *being* The House of Troubles or being their figure-heads is FAR fetched. But that their personalities embody things for which the 4 Bad Daedra stand for is... Undeniable... and odd.
Seeing how there already are numerous Elder Scrolls refernces, *I* doubt someone inside the SadCrab Team didn't notice this "coincidence" as well.
It *may* be a JKR thing and not the game thing, we'll need scholars, which read the books, to settle on that one...
Edit: Also, I'm certan Rattlesnake's "trip down the memory lane" cloud be interpreted similarly to Nerevarine's journey. One relives Nerevar's life symbolically (uniting Houses, Tribes, etc), the other literally relives his life as Marcus through the pensive.