So I beat the Iki Island DLC for Ghost of Tsushima. It was solid content. A little less emotionally impactful for me in some ways, but it's not like I was completely disengaged. Just, the emotional crux of the tension, was built on something that I wasn't as empathetic about. Still, very solid writing, voice acting, etc.
Ran into several bugs with this DLC though, that I do not recall with the base game. For me at least, base game ran like a champ, with zero issues (well, other than the platforming stuff I've mentioned before. But nothing like npc's glitching through stuff, no falling through the world, t-posing, etc. None of that). The DLC...seems to have introduced some minor hiccups here and there that are way more noticeable, and one bug, related to the new horse related content, that's completely fucked it up and made it inaccessible. The horse armor, has stats to it. It makes your horse's attack action (new with this DLC) WAY more OP (and awesome). But, for some reason, the game keeps unequipping the armor, usually between cutscenes. And, the option in Accessories to re-equip the armor, isn't there at all. The option for horse saddles and the armor (it's all in the same tab), is just completely absent. The only option I have is the flute.
I'm not sure why? My theory, is that I didn't unlock alternate horse saddles in the base game with this save file, so the game got confused about where to put the new armor stuff. But....actually maybe not, because I got the version with the extra content, including special armor for Jin, and matching saddles...so maybe I had access to it from the start and just never looked? I can't recall. Cosmetics like saddles, on a horse I almost never ride, are very low priority obviously. Anyway, I had to fully restart the game to fix the issue....until it happened again at the very next cinematic. So, yeah it's currently really strange.
Again, for me, not a big issue, because I don't like horse combat much, and given the verticality of the maps, you can't go very long in any direction before you need to hop off your horse and climb down/up a cliff to get to the thing you're going to. So I usually just run and fast travel. But if you are a fan of the horse, and after this DLC you probably fucking will be, because he's awesome, you might be frustrated at not having your Armored Horsey Boy of Badassery to ride around with, trampling Mongols and cackling as you do so. To clarify, the Charge Attack itself, is still totally doable. But the armor set that makes the attack more powerful, is what's bugging out for me. So you can still smash Mongols, it's just not as effective, or sustainable.
Still, good DLC, I enjoyed it. DEFINITELY wait until you've finished the main game though on a save file. It really just makes things strange if you don't do it as post game content.