That is subjective but I think it should. You install the package `numbers` and don't provide any way to toggle b/w relative/absolute line number modes except for doing `rnu`  and `nu` manually. I had to go look for the function in the source that does the toggling. Also for people who were already using `numbers` in their vim configuration, if they decide to upgrade to `spf13-vim`, they have to re-enable the keymap.