Things that path of Exile 2 could learn from Last Epoch

TLDR: Ease of use of ingame systems like trade and stash tabs actualy in game. Either proper crafting or ways to "pull the lever" on now available identifiing with steps more times than once.

Trading
I think that actual state of trading is unacceptable for modern game. LE has problem with SSF vs trading solved and with great result. What it basically does is that you can either trade or join faction that allows you to target farm better and pasively improves your drops but those items can't be traded.
Also fact that you can sell items multiple times allows for cornering the market and cause inflation.
Possible solution:
1) Allow trading in game without need to whisper, teleport and manually accept trade. LEs solution is good, but can be even better if you would allow auctions (set time to end and starting price and/or buyout price) selling could be still done through premium stash tabs but buying would be through npc and would be instant in case of buyouts. This would better the experienc both for buyers and sellers since you don't need to be online, you don't need to leave map in progress and it will solve problem with whispering multiple people who would not write you back.
2) Allow each item to be traded only once (or limited time). This would probably highly decrease number RL selling and would be better for economy. You could no longer buy item for low price and set the price higher.
3) You want be better than LE? Add auctions in addition to filtering and buyouts.
4) Solving disproportion of SSF being not solo experience but hard mode is more or less caused by crafting being so random, but adding ways to target farm for SSF or passive drop upgrades would make it from hard mode to enjoyable solo experience. There are other modes like hardcore for non casual players.

Stash tabs
Since premium tabs are paid I was expecting something more configurable (again look for LE where stash tabs cost gold and can be configured to contain certain types of items to sort them for example by item type, rarity and so on. It is sort of ok right now but could be much better.
You want to be better than LE? Add also affinity by certian affixes in addition to item types.

Crafting
In actual state it is basically identifying with steps or gambling with multiple steps and in most cases is not worth it for non SSF characters (you can get for 1 exalt items that you would never craft from white)
Solution: Add orb to either only remove random affix (can be multiple orbs, one to make blue with 1 affix back to white, one to remove from blue with 2 affixes, one to make rare into blue by removing 1 affix from 3, one to remove random affix from rare with 4+ affixes) those could have different rarities and drop rates but should be all more common than chaos orbs. This would allow to "pull the lever" multiple times if you have hoarded currency for craft-gambling.
Other way would be to have another different system for more targeted crafting (could be increasing number of essences and also having different tiers to add from 1 to 2 and from 3 to more) To avoid crafting ideal gear when there would be way to use essence on any step you could still limit number of essence affixes to 2 or 3 per item.

Loot filter
Why is it not editable in game? Why import or create file inside some folder on my system? This is unacceptable in modern days. Again, learn from LE and do it in game.

Overall actual systems in game are not bad, but they are lacking seriously and could be much much better.