So in Sierra, there's now the ability to group windows with the built in tab system. This is great and all, but breaks integration with the popular command-t vim plugin. It would be really nice if there was a way to modify the key maps inside macvim, or just disable the native tabs altogether.

Obviously I can remap the command-t plugin, but having non-remapable keys in macvim limits your ability to ever map command-t to anything other than native tabs.