I was about to make another long post and complain but I had to do some more research for I post any more ignorant stuff.
The reason why d3 and d4 look and feel different than our beloved d2 is because of how they were designed
In the classic diablo, the game was design in a 2d lay out for example: (we can't really go pass certain obstacles like trees, puddles etc... because of this)

In modern game engine, diablo 3, theyre more specific, instead of 2d, it is now 3d. things are more specific so you can actually pass each other and other obstacles.

Because of this, the entire game was changed. Feels different, look different. It's not blizards fault. theyre just keeping up with todays technology.
In this video, the original creator of diablo 2, says that, "...making these modern diablo3,4 look and feel like diablo 2 is impossible, due to 2d vs 3d designs. If they want to make the game look and feel like diablo 2, they would need to somehow use 3d technology and make it look like 2d. which is extremely difficult and takes a lot of time." video goes and explains further details why this task is really difficult.
This post was edited by Whiteshadowmaster on Nov 1 2019 05:48pm