While I agree familiarity with SDF is important for a complete enjoyment of DYRL?, I feel that it has its own charms above the visuals.
1)The visuals, not just detail, but style, in my opinion are outstanding and unlike the Mac F movie and Mac Plus movie, it did not reuse animation in its re-telling, bonus points there. Sure Macross Frontier and ZERO are pretty, but DYRL?, much like Mac Plus, is hand drawn, lending its own unique sense of style that the newer CG productions cannot touch, and when they try it looks a little funny (Reactive Armour Roy scene in Zero anyone?) DYRL? is visually the first or second best hand drawn Macross (depending on your feelings about PLUS).
2)I felt that DYRL? had a more adult feel to it, and a more serious tone then SDF. Some people don't like that; however, I do and Macross Plus and ZERO also have this in common. Roy's death, the desolate earth, Minmei's rescue scene and the last battle all had a more dramatic, epic feeling to it then SDF. Earth was destroyed in Ep 27 SDF during the battle, where in DYRL? it was already gone, making it more dramatic as we really understand that the SDF-1 is really the last of humankind, whereas during Love Drifts Away, we aren't quite sure the entire extent of the earths destruction (later finding out it was mostly complete).
3)People complain about poor/little development of secondary characters, but I feel that they did not really deviate from SDF and so if you had watched SDF, the characterization of the secondaries while it would be nice, was not needed. Like I said above, DYRL? is better enjoyed with a familiarization with the SDF characters.
Anyway, to each there own, but I do think DYRL? is fantastic and it makes me sad that people don't like it but LOVE the new Frontier movie.