So they reincarnated and lived happily ever after...THE END.
Honestly, I couldn't care less about their reincarnated lives.
To me the true ending was last chapter, while it was a bit lacking it, at least it was still related to the original characters, as for this, I consider it as fillers.
No matter what the story was great and this ending will never change that, it's just that...
I wished to see Tanjiro and Nezuko weddings (Not with each other, but with someone else XD) and a short description of each main character's path after leaving the demon slayers!
Now that my ranting is finished, see you in some other work.
Peace!