One advantage would be not having two separate rules.
I don't see why that's such a problem. The grammar of LI...LOhO is already unique; that's why it's its own selma'o. And I don't think there are any serious attempts to combine it with any other selma'o, unlike sumtcita.
(Just declare all words to be in selma'o UI, then there'd be no more problems anymore. zo'o)
But seriously, if LI...LOhO is messed with, breaking the functionality of {me'o} (and {li'ai}, which under your proposal might actually be now needed to quote things like R2D2 {li'ai ry re dy re} instead of using it as a bare sumti), we'd be forced to come up with a new selma'o just so we can quote arbitrary character strings without attaching {bu} to every nacle'u.