>>719217629
No it's not
>Several boss cheeses nerfed, from the lol tier like the konami code on The End or using a pill at The Fear, to increased invulnerability frames on the Pain's animations and Volgin/The Boss not allowing follow up shots by quick re-equipping
>The rocket launcher, thowing items and sniper aiming are much slower and harder to use quickly
>legacy controls are not 1:1, aiming and shooting is done with L2 and R2, leaning is simplified, and you can't seem to rebind it for some reason
There might be other stuff, but there are very deliberate modifications if you know the game by heart.