I am more than happy to accept this happy ending version for this couple and this drama, but only the first half in which she wakes up and they live happily together. If I have to accept the second half of the episode, then it doesn't really make sense how the first half is possible.
The second half is about the secondary and even the potential third couple. The second couple Nanan and Luo Ji, I'm fine with, but it's the third couple's storyline that doesn't make sense. Naxi and the other prince's romantic storyline doesn't make sense as they show that she goes back to him during the poison smoke. However, chuyue already changed that and that's why she fell asleep. That's the timeline that we're on, so the whole part about Naxi saving the prince during poison smoke is impossible--it didn't happen. Now, if they somehow met again at a later time and fell in love, then maybe. But not during the new timeline.