So it was that darn Unearthed Arcana that has prevented them from doing the oft-requested "put inventory items in the bag of holding so they don't count against Encumbrance" feature FOR THE LAST 3 YEARS??!?
WARgames are inherently violent. If you want to replace combat entirely in favor of some sort of social resolution system you risk alienating your base like 4th edition did for 'not being D&D enough'.