If I can do more damage by throwing a 30 pound barrel than a spell, spells are stupid. ?
Barrelmancy is one of those things that I keep waiting for them to address in some way because its so obviously a broken thing that doesn't fit into any system.
And the solution to me is so simple it's quite silly. An empty barrel, by the way, doesn't weigh 30 pounds - it weighs 100 pounds.
A barrel full of oil - weighs 300 POUNDS!! The mechanics are already in the game to fix this, it could be done easily. You need a minimum 10 Strength to move a 300 Pound object, and if these items are that heavy you are not going to be able to carry them around in a backpack.
I don't want to stop people from being able to move objects around the room, but there needs to be a hard limit on stuff you can just throw in your pack.