I have played and given every Souls game a 5/5 except DS2 which I rated 4/5, and I can say from the bottom of my heart that the Shadow of the Erdtree DLC as its own game would be a 3/5.
I would say Elden Ring's base game is probably my favorite of the Souls games. I have no hit all of the bosses and completed multiple challenge runs, but so far, I can say that I do not enjoy the dlc. The bosses are super cool and at some points of it the dlc is super fun, but I can't say that for the entirety when there are bosses such as Commander Gaius, Rellena, and the Consort. And no, these bosses aren't my only problem with the DLC.
The overall damage scaling itself is crazy. I usually don't care much about super crazy long combos cuz I think they're fun to figure out to misdirect them with strafing but it becomes not fun when if u mess up u die in two hits.
This honestly would've been seen as my favorite game even just as a dlc, but Miyazaki had to ruin it. In my eyes, the only way it could be redeemed is if they just lower the damage from the bosses. That's my only problem. If they scaled their damage down to what is considered normal in the late game of the base game, then I'd be perfectly fine with this dlc and would give it a 5/5.