This is not specifically related to hardcore but an idea that came to me that would be cool to see in game is faster gem leveling. For example the percentage should scale above 100% so that you might get more than one level. That way if you complete a rift level 60 and pick a level 1 gem you might get 2 or 3 levels instead of just 1
Love D2 HC! Only 20-30% of my deaths were due to lag and other technical issues (lost connectivity, pc error, etc.).
Still staying alive in D2 was much more rewarding exatcly because all of this. This is how hardcore should be.
A lot of people will understand what I mean. Quitting hardcore after dying only means that you do not like the hardcore mode. Dying in hardcore is key part of the challenge. Now this death ratio has been greatly reduced which brings more people to hardcore only to disappoint them after hundreds of hours playing.
I remember attempting Duriel on my old PC. It had like 1 minute loading time! On single player it was fine, but in battle net the game was going in the back while my PC was loading it, so I was kind of seeing screens of my dead body while waiting to load