If the player has a bit of a realism crisis and wants to catalogue exactly what its character has down to each pin, or as soon as a GM starts giving out monster's parts, when a ranger gets a pet and gives it armour and stuff to hold or when we reach half the max level, our equipment becomes incredibly clustered. While that isn't a problem on character sheets thanks to the [spoiler] tag, this isn't the case for the equipment tab, which has everything in a single, unique list.

Adding the containers object type and a folder option for objects allows not only to have a more visually ergonomic and more organised equipment list but also to know what is where and remember suddenly that you DO have that key that you need to open the door to the next room and that you picked up three sessions ago.

Assigning the folder type to things other than containers (mainly animals, but also any other thing) would allow you to note components of a certain item, or what your horse is bearing. Thus, adding a tag to create a sub-total weight would allow for easier detection of errors in writing the weight or having too much stuff in a certain backpack, and how much your horse is actually holding. Having the option to make objects not count toward your total weight would also allow having a cleaner total, without what your mount is holding and without the uselessly 0.02 pound of the key stuck in the jewellery box you're trying to open that is in reality masked by the weight of your heavy armour that is marked down as 65 pounds but is really 67.53 pounds.