User blog comment:Emptylord/Sandbox/Custom Patch Notes/@comment-4068613-20140214033305/@comment-3974211-20140311120757

It's only less intuitive when you word it stupidly. When all items offer "crit damage" and you get an item that says "Your crit damage is doubled." it makes perfect sense and is entirely intuitive - that 30% you've bought becomes 60%.