Maybe the transporter change could be explained by an advance in transporter technology?
More probably, it's simply that when a Trill comes out of the closet and tells there's a parasite in his or her tummy, the transporter operator doesn't panic and hit the "PARASITE REMOVE!" button and kill the symbiont.
Or even more simply, when the Trill is candid about his or her inner self, there's no need to worry about the scans involved in a transporting process - scans that would reveal said inner self despite attempts at secrecy. Transporting need not pose any sort of a danger to the symbiont, other than the danger of exposure; that alone would be reason enough for Odan to avoid transporters and to lie to our heroes about certain related things.
There is a cultural aspect too. Odan's hosts did not use their names, they were all Odan...as opposed to Tom Odan or Jackie Odan.
To be fair, Odan in "The Host" would have been using the simplest form of its/his/her identity out of sheer politeness. Why confuse Beverly with complications?
OTOH, if Odan were something of a bully, giving less leeway for the host than the average symbiont does, it would naturally also prefer the symbiont name over the joined name - even if this were considered rude by Trill terms.
It REALLY bugs the crap out of me when people discuss race and have no clue what it really means.
Indeed it does. In every other species, it "really" means a subcategory of species, evident from the phenotype. But for some mysterious reason, it's forbidden to apply this definition to subcategories of the human species, equally evident from the phenotype.
Homo sapiens is one species, but to pretend that it isn't multiple races is truly asinine. And races have nothing to do with geography or culture, as the term "African-American" ought to spell out clearly enough.
Whether one race is better or worse than another is a question to be discussed on a case-by-case, attribute-by-attribute basis, rather than through generalizations filled by hate and fear. But to pretend that race doesn't exist when it literally stares you in the face is tacit declaration that races indeed are of different worth and for that very reason must not be brought up in polite conversation. Which is a silly idea and certainly doesn't deserve the sort of reinforcement it gets from all this "race mustn't exist" nonsense.
Of course, Star Trek is a perfect forum for discussing the concept or lack thereof, as race there is simplistically equated with culture, and typically with a villainous and weak element of culture at that, so that the weakness can be contrasted against the behavior of our human heroes in the plotline of the week. It just happens that race is camouflaged as species there, so that what appear to be humans with slightly differing phenotypes are instead identified as representatives of nonhuman species. The built-in racism of Star Trek is a wonderful storytelling device - but it does cause complications when one needs to tell stories about racism!
Thankfully, the exotic Trill biology at least distances the Trill stories a bit from the usual racist format and towards a specieist one, which may be of relief to some.
Timo Saloniemi