Maybe those points aren't addressed to the depth you would like, but they're all addressed. In fact, some points, like culture shock are addressed better in DYRL than in SDFM. SDFM it's just some song, in DYRL it's a protoculture song that awakens dormant memories in the zentradi. Breetai goes renegade to protect the lost culture and because his boss just blew his fleet to hell. Max ditches the UN SPACY for exactly the same reason Milia ditched the zentradi, impressed by fighting ability and fell in love, SDF-1 has a bunch of miclones and the zentradi are curious, hikaru yells out, "kakizaki!" which is just shy of the little catholic cross he signs in the show, gloval is the captain of the ship, roy tells claudia and misa his relationship to hikaru and hikaru's back story.
DYRL flaw is that half the movie is exposition to cram all the crap in, it effective takes the pacing of the movie to a crawl, lurching to a stop and then starting back up again at several points. The audience's view point gets shifted from character to character and things get explained in an order not consistent with the events being portrayed, that's not the same thing as not being addressed.