Ok that's the DLC done.
That final boss... First phase is fine (still I find chains too long and too less opening in between. Stamina was an issue there) but the second phase... Teleportation, constantly moving or being airborne, huge after attack effect, visual chaos, several gigantic AOE attacks (some of which come out pretty fast)... Not for me. Ho I forgot some questionable hitbox on some attack.
Also I was lvl 18 in Scadutree, use the Physick that redude damage and have 1900+ HP and still die in 2 hits in phase 2, sometimes also in phase 1...
This boss is peak "FromSoftware games are hard" but not in a good way. I can only hope that they don't pursue this route on there next Soulsborne game.
I started quickly to summon one of the NPCs. Then ended up summoning players (many use big shield + poke strategy often with Scarlet Rot or Bleed).
Also find afterwards that I haven't finish Ymir's quest. I went for it. Really like the lore around it. Glad I didn't miss it.
Overall an impressive DLC, especially on the art direction and lot of new and fresh weapons/spells/AoW... But too much exploration for nothing and too many emphasis on hard boss (hitting way to hard and too long combo). Honestly I don't get the whole Scadutree blessing mechanic. They could have just made the boss around similar level (or slightly higher) of endgame bosses and you would not have needed this system.
The way I see it is that it was just a way to make the DLC longer. It makes you looking for the blessings just too be able to have a chance against bosses because they pushed their HP and damage through the roof instead of just pushing it a bit further end of base game level.
Highlight bosses for me were Romina, Rellana, Putrescent Knight, Midra and Death Knights (surprisingly good for catacombs bosses). Divine beast was nice in term for visuals design but to fight it was not enjoyable for me.
PS : Concerning my difficulty comment : I did most of it solo (not summon, Spirit ash). Only summoned for Bayle (because quest) and Final boss (because bullshit).