a lot of unstacked lootbags are annoying.
How about adding a config that can configure the bag size(5,9,27,54) and can set the relative loot chance(the chance for loot items to appear compared to the normal loot chest)

I'm not sure what you're asking for. Do you mean stacking bags that open in clumps? Because that is way more complicated than just stacking bags behaving correctly and there are multiple closed issues where I describe exactly what that entails. Do you mean bags that give more total items, like a compressed bag? Because removing the max item limit is on my list of things to do, it just requires wrestling with the gui system to allow for a variable amount of slots.

It will be like a compressed bag: multipled slots, behaves like opening multiple normal bags continuously and put all items into the compressed bag