I would like someone to enlighten me about how DHS is a "less than a full day park" at the present time. Assuming you arrive at rope drop and stay for an 8:30 Fantasmic, I find it hard to believe that even with FP+ and shorter than average wait times that you can experience every show (Frozen Sing A Long, Voyage of the LM, Beauty and the Beast, LMA, IJESS, Disney Jr, Live on Stage, Muppet Vission 3D), ride every true ride (TSMM, RNRC, HTT, Great Movie Ride, Star Tours), eat twice (perhaps one TS and one QS restaurant), perhaps spend a little time with the kids in the Honey I Shrunk the Kids area, wander about the Streets of America (and all streets for that matter) and maybe even do a little shopping and have very much time left over. I even left out things like the Jedi Training Academy and viewing the Frozen short movie. If there are attractions you chose not to experience that's your personal preference.
As far as the "half day" park claim - unless you are doing a Clark Griswold at the Grand Canyon, there in no way you can do it all in 6 hours.
I know that the future holds some serious changes, but my comment above is based on where I like to live - the present.