HEAVY SPOILERS
1. After Shuli's death, Jeremy cancels the engagement but then they go after Elias instead and his ex fiance ends up getting pregnant (I forgot her name) so Jeremy has no excuse but to accept the engagement. So yes, Elias ends up with her in both timelines. Only difference is she ends up good in the 2nd timeline.
2. Shuli and Nora DID meet up in the first timeline, only briefly. Although without Shuli's influence/interference, Nora ends up a bit cold since you know the abuse sticks but their brief meeting ended up him taking an interest on her and with her death, it is Nora who is in charge on her investigation and is the one who tells the kids on Shuli's sacrifice to keep them safe.
3. Shuli's death is incredibly sad, originally the spoilers say it was bandits who killed her but in truth is it was all planned from all her enemies (cardinal, husband relatives, etc.). The traitor in the household being the head knight Abbington (aka the knight last chap and one of the 3 trusted people of the household in the current timeline. Basically, guy just respects the former marchioness and from what I've read is maybe affiliated with the creepy cardinal.
4. After Shuli dies, they mutilate her and cut off her body parts into pieces and dumps her body in a sh*t pile/dump/hole, I forgot. Her head was never found.