My suggestion consists of:
The "open" feature in looting bag settings for all the items to go into the looting bag automatically. (picture added)
Making it have the feature of the coal bag, larger space for higher donator ie; 28 regular 35 donator and 45 for super etc etc, or even add it to the donator store or even slayer\pvm store to buy 5 spaces at a time for the looting bag.
"Open" feature should be easily implimented. Once "opened" loot the items and they go straight to the looting bag rather than the inventory and manually putting in looting bag.
The Larger space feature could just add a scroll bar to scroll through the looting bag inventory to show the extended spaces.
Thankyou for your time, Reggie.