In D&D-Terms:
This is called WBL (Wealth-by-Level) and is/was used in D&D 3.0/3.5, Pathfinder and partly in D&D 5E. It´s an element of playdesign.
It´s all about challenge; in D&D you can meet a dragon at Level 1 and will be killed (or you run away). At later levels when you have more HP, AC, etc. and better items you will stand a chance.
The real ? is why are you leveling if you don’t like it. I haven’t played normal or epic difficulties in over a year. I start all my characters at level 65 with mediocre gear in Ultimate. As this is the real game anyways to me. I find Normal and Epic to be a long tutorial teaching you mechanics and purpose of stats ike DA, OA & Resists.
Now that expansion is going to be out I will be starting over from scratch so Yesterday I started my 1st character on normal and It actually feels fresh and new again. But after a few characters I will start to skip standard again, then after a while I’ll start to skip elite again.
I enjoyed leveling from beginning maybe with my first 5 chars. After that, I enjoy theorycrafting on grimtool and I would like to jump right to a lvl 75 char to use my legendary items and test my builds.
I would make difficulty bound to account, so you have to unluck once. And add a new component that grants stats like -33%/-66%/-100% item requeriment, for all items.
This will allow to make a new char lvl 1 who can use legendaries. You still have to run all difficults if you want all shrines or quest stats. But at least it will be faster.
You could start on elite and get lvl 50 in no time (I guess). Also note that starting a lvl 1 char with full legendary items is still hard because you do not have a lot of OA, DA and life pool.
What I like about this is that is optional. People who likes current state of game can still playing that way.
I don’t care if they implement this. Currently I can use an external tool to achive this.
Just sharing my opinion.
Maybe have some +xp gear options which are a trade off to some other modifier but players who play a lot and save good items can have a high amount of +xp modifiers on their gear relatively. This is how it was in Sacred 2 which is even more a grind so it kind of needed that gear option.
I saw on a stream today there seems to be a potion that gives a bonus XP buff.