I ended up playing most of this Sunday. Compensating the fact I barely touched it during the weekday.
I killed Mohg, and man, that really took a good number of tries, unlike other bosses. Lots of xp as reward. I also advanced on the Miquella’s Haligtree up to the second save point, and believe me, I had to do like 20 times the first part, from all the times I fell off the branches. I disliked how pitiful were some of the loot from hard to reach places. :/
So to finish the game, finally, I have to finish the Haligtree and the last area, the crumbling whatever.