Can we talk about some scenarios where the emperor falled in with Ludovica but still married Elizabeth for duty.
Scenario 1: Ludovica married Johannes.
Although she could still died young after giving birth, Johan will love the child and never take another wife, in case he also died early, he might still remarry Shuri so she can protect the child and the house.
If Ludo doesn't died young and Johan meet Shuri, he might feel empathy with her and adopt her or even have her engage with Jeremi (my bias, my ship).
Scenario 2: Ludovica married Albrecht the Duke.
Although she could still died young after giving birth, she might able to encourage him stand up against his abusive father and not continue the cycle of abuse.
No offense to Lady Heidi but she's so weak, both in body and will, she doen't do anything to protect her son. Comparing to his strict and stern father and sister, he's meeker so he needs a strong-willed woman can help him has the courage to break free.
If Ludo doesn't died young, she can even retire the father-in-law to some countryside villa so he can't abuse her son.
Scenario 3: Ludovica still married the emperor
The emperor chosed her and broke off the engagement with Elizabeth already caused rift between the big families. I wonder Ludo's early death is natural or something else (like a drug making her body weaker).