I'd like to be able to load both of them at the same time without conflicts.
OK, that is an argument.
i have a counter argument for too much renaming: the closer the two codebases are to each other, the easier to pull over patches, or ultimately to merge the two projects.
people should rarely want to load two versions of the same project/functionality into the same image, and IMO the benefits of being able to cherry-pick patches both direction is bigger than the loss of the ability to load both projects into the same image/emacs.
please note that i don't argue against renaming the .asd file (small change), but i do argue against renamings that touche on every second line of the code.
but it won't be my headache, just throwing around my two cents.