This is exciting, I would say the chance to drop multiple items from chests isn't needed though, may bring too many of these items into the game, especially frag stashes.
I would like to see certain items removed / Moved to different chests / used in new recipes to make them relevant again:
I posted the following on the road map thread:
Some changes I'd like to see to the loot would be to remove some of the gag prizes, or move them to bronze key chests. When you spend so much effort looking for a chest, then you spend 10 million gold on a key for it, and end up with the gag prize, it's quite annoying. It already takes enough effort that there really shouldn't be a gag prize.
Remove Brew of the Buff Thief from Spirit Chests
Remove sundering Brew from Rune Engraved Chests
Remove Draft of the Revenant Hunter from Twisted Chests
Remove Potion of Genius Gatherer from Alchemist Chests
What's most needed is to remove Reborn Leaf Staff from the Steel Chest, its ridiculously outdated.
These could maybe even be used in new recipes, the potions too.
I also I think the 4 potions mentioned should be split between Wooden, Gladiator, Solid Bronze and Studded Chests. Or maybe revamped into something new and worth looting.
A lot of the potions for the crystal key chest are worth 1/10th of the key itself, so distributing them to bronze key chests makes sense, or revamping them and maybe changing that level or even what buffs are in them so people get more use out of them.