First of all: Wishlist on Steam. For sure I'll be happy to give you some bucks for the nice game! I just have a few thoughts:
• The next to unlock material should be visible in the glossary. Otherwise it's a simple guess, when you'll be able to gather them.
• Bag filters don't respect the rarity of all items (priority wrong? :)).
• Just some QoL things: Shift + click should be a thing, if you could do that. Shift + left click: Wear/exchange (in bag)/remove (on character). Shift + right click: To scrapper. Keys from 0 to 9 could switch bags. Maybe an option to do a popup, if flasks are near to be empty (maybe a slider on which percentage the popup should appear). Also the Alchemist should have an upgrade to allow auto-filling flasks (offline-progress related - maybe pair it with the slider for the popup to autofill).