Weaver Tree imprints are great for farming, but if you’re not really blasting you can miss their impact.
A message that informs you of the proc would help. And I would like the numbers tweaked a little to improve chances for the desired outcome and not reroll a T7 for example.
It would be very helpful, if we could influence the item types of items from nemesis, maybe even have an Egg for exalts or rares, maybe have an imprint that gives Nemesis similar items.
Crafting:
In general I wish the variance in forging potential used would be far smaller, it feels really bad to waste 20 fp on a simple upgrade.
We obviously need more glyphs, especially if we consider Envy should be a rune.
Evolution could be a glyph instead of a rune. To compensate for the choice of affix, it could have a chance to fail.
Glyph of Hope could be split into a glyph that has a chance for upgrade to be free and one that increases crit chance.
It would be great to improve CoF prophecies for exalts or maybe give bonuses for imprint procs. Even better add prophecies that improve imprint proc chances.
I love the weaver crafting, but it would be great of the different echos gave you tokes to use at npcs in the Haven of Silk. So you could save up on them and use them when you really need, without running the echo.
I mean everything from enchanting idols to shattering sets and rerolling uniques.
Lootfilter:
Please add the rarity of affixes to the loot filter menu or even an option to show items with affixes we have only x shards of.
Hide affixes that won’t apply because of the selected item type or make this an option.
Stash:
Add an functionality to copy the setting from one tab onto another. Like duplicating, but later. 
Add an functionality to select a lootfilter rule for tab priority.
Add the option to show which lootfilter rule applies to items in stash/inventory.
Add a hotkey to move an item to the current stash tab, overwriting tab priority.
Add an option to pin or highlight selected buffs, so we can better keep track of them. (like Silver Shroud)