While they’re supposed to be raising item limits in 7.2 or 7.3, it hasn’t been confirmed whether that will be indoor and outdoor, or just indoor.

No matter what it ends up being indoors, I doubt we’ll see as much of a raise for outdoor. The insides are instanced, the outsides are permanently loaded, and having too many yard items could be a big server drain. It’s also why they can give us more interior customization.