The notion that Julia is not thoughtfully designed, and therefore we won't have the resources to make it run fast, is close to being the opposite of the main idea of the project. We don't want to go to extreme lengths…
Nothing more will be added to Core (though a few things might be removed), and very little more will be added to Base. Most new stuff in the future will be in separate packages and modules.
The notion that Julia is not thoughtfully designed, and therefore we won't have the resources to make it run fast, is close to being the opposite of the main idea of the project. We don't want to go to extreme lengths…
Nothing more will be added to Core (though a few things might be removed), and very little more will be added to Base. Most new stuff in the future will be in separate packages and modules.