I wouldn’t make assumptions about the location/object of {tlheD} based on {mev}. The nuanced difference between the verbs might also have differences in terms of the presence or absence of {-vo’}.
The distinction of {-vo}/no {-vo} with the verb {mej} is the implication of setting out from a place for a journey to another place (vs. just not being somewhere anymore).
That implication is already built into the verb {tlheD}, so I don't see a way for it to accommodate the same distinction.
-- ghunchu'wI'