Write it as you want to, you should be having fun doing it. Everyone here knows it's originally a Xiuhan story if thats the only tag you used with Luhan's name. For the readers' sake though, if you change and there's no other tagging warning for another pairing it's not fair since ppl have expected that tagging to end up from the start. You should think about that from the beginning of a story then :)
That's my opinion ♡
Just do as you want :)

Lol rude much. But dude yes honestly bottom!xiu is great with anyone in my opinion so I honestly don't mind who he ends up with. But the lil rivalry between Soo and Han would be cool ya get me. Good luck author-nim~

Hey. I love this story abd id love to see it as xiuhan but I love xiusoo its my secret ship so in the end whatever you choose is your choice and ill be happy. I see a comment underneath me as I'm typing and they are saying some pretty rude things I just want you to know that i think that is so awful. You have an amazing story And have left the pairings open ended. I love that about this story that there is so many places this story can go, that there is conflict that makes it unpredictable. You are doing awesome dont let those idiots get you down.

Please dont take this wrong, but if you start this as a xiuhan fic, i found completely outrageous you asking us how do we want this to end.

i thought you were serious, but honestly, now, i think you are plainly stupid