I get your point and agree. D2 had very detailed feedback back in the days, like the poison example you mentioned.
Also I miss the base damage type effects. For example, if you have a weapon with fire damage, you saw a small flame effect on hit. If you had cold damage you sa a blue icicle effect, small lightning tendrils when you had lightning damage.
If you killed a frozen enemy, you could shatter his body and it would sould like breaking glass.
These are details that are missing in LE. Maybe this stuff is all on EHGs radar for the polishing phase. I hope so.
I also voted for more different death animations and effects, depending on the damage type that they were affected by. If enemies died while ignited, they could turn into ashes. Dying from poison could make nasty sizzle sounds. Cold O already covered above.
This and the missing hit feedback makes the feel of combat very flat. Screenshake is not a solution, because most people turn it off. It can become annoying. It’s animation (small stagger) and crisp hit sounds.
You get used to the LE combat and after playing for a while, you don’t care that much anymore. But if you then play another game (doesn’t have to be the same genre) you can see and feel the difference. And that are the exact moments where I realise that theres still stuff missing on LEs combat. Other games are better in delivering a feel of impact.
LE is improving a bit from time to time. Yet, I’m still missing the “big” step, the noticable improvement that makes the difference.
The feel of combat is one of the most important features of a game. Sometimes people might just play a worse game with worse mechanics, less depth, less features, if just the moment to moment gameplay is superior.