The thread I wrote this for got locked so I thought I'd put it here.
I don't fully understand the love for Elden Ring and how people say its better than a lot of open world games when it suffers from a lot of the sames issues,mostly empty world and being way too long. I enjoyed my time with it but enjoyed it a lot less as it went on. Game is also the least challenging of the Souls games I've played,area and boss wise,they're all pretty easy. With the the exception of Malenia but then again when the only hard boss in your game is the one that has been proven to be actually broken and not follow the rules of the game then you fucked up.
I am a Souls fanatic so I am biased but here my thoughts.
I don't know if it's a better open world than other one but it's a different one. Very few indications giving you a true sense of exploration, like BoTW did (at least for me).
I haven't play a lot of open world but BoTW and Elden Ring are my favorite for their exploration. The other I have play is Witcher 3 (which I found impressive but too long due to the amount of lenghty side quest) and Horizon Zero Dawn (which I love but if you go off the marked path to explore, you'll find nothing).
In Elden Ring, you have total freedom and wherever you'll find something (a dungeon to explore, some loot, a NPCs, ruins...).
It's a very lengthy game if you do everything and even me I was a bit fatigued at the end (190h on my first blind run). But again, it's up to you if you want to do everything. You could not explore everything and do the rest on others runs. Souls game and especially Elden Ring are made make you miss some stuff and to be replayed.
My love from the Soulsborne doesn't come from the difficulty and actually impact very little my appreciation for these games. So I can really comment on this one. I found the difficulty similar to others when it comes to major bosses. But given the freedom and option the game is offering, the experience of each is very different. Some will say "Malenia is super easy, I first try her with my Mimic tear +10 and my spamming of *insert OP Weapons/spell/ash of war*" and some others will have a very hard time because using some suboptimal builds (like me xD).
I don't get what you mean by saying Malenia is "breaking the rules of the game"