I want to try kickstart in its simple form, and be able to update it periodically.
That said, I have years of use with a different <leader>. Changing leader after init.lua loads doesn't help, as that means all the builtin keymaps use <space>, and my addon customs use another.
Proposal: inject a config call, immediately after leader (and other vim base settings) are set, giving the user a change to override those before the remaining keymaps and plugin setups run.
PR to come shortly.