I personally love DHS. I love Sunset Boulevard and the lead up to TofT as you walk up. TofT is my favorite attraction. I haven't been to DCA since Guardians took over, but even so, DHS's Tower was always better. Add the Star Wars attractions (which I still think GE does not fit in DL) and I love spending time at DHS.
My last trip to DHS, I skipped Star Wars, since I had seen it all at Disneyland. I will fully admit a Disneyland bias here, but it's extremely difficult coming from California and respecting the inclusion of Star Wars in Hollywood Studios.
So when I look at Hollywood Studios from the perspective of what is different/unique about the park: it really starts to fall apart. Tower of Terror had much better placemaking at DHS, but the ride itself was not as great as the DCA version and desperately in need of reimagining. Sound, video and lighting equipment all needs to be upgraded and something has to be done with the hokey 5th Dimension room. The original Tower of Terror has a great setting and story, but feels like a lumbering clunky mess of an attraction.
Great Movie Ride was the soul of the park and it's gone now, so there's that. And the Mickey ride is going to end up at Disneyland anyway. Meh.
Toy Story Land? Midway Mania? Launch Bay? Meh.
I love DCA too. My biggest problem with DCA is the amount of attractions that can be found at my local amusement park. I can do swings and such at my local park where I paid $180 for a season pass (less for my renewal this year). DCA is way more expensive. I prefer the more unique dark rides that DL houses. I also hate the overlays that plague the attractions (Guardians, now Incredicoaster). Again, I've just seen the YouTube videos, but I think it's particularly shameful that they took an excellent rollercoaster and put cheap-looking characters on it. DL and its overlays....ugh. Hopefully Avengers Campus will be equal to GE/Carsland.
Avengers Campus will be fun, but Carsland it is not.
The thing about DCA that elevates it beyond the half day park I still see DHS as, is that change in philosophy between DCA and DL that complement each other really well. I think the disconnect here is that for Disneyland, DCA is really taking the place of Epcot as the second gate/more grown up/educational experience.
I think that Guardians is a better attraction than Tower of Terror.
I think Incredicoaster is an alright attraction, probably on par with Rock n Roller Coaster. It definitely was better as Screamin, but the coaster is pretty much the same.
I get more nostalgic for Soarin over California than anything at DHS. I guess Smugglers Run is the closest I can compare it to.
Radiator Springs Racers may be a better ride than Rise of the Resistance for some, but just on IP, I'd prefer the Star Wars one.
Grizzly River Run is still a gem of an attraction, even if I never want to go on it.
Monsters and Mermaid are both decent dark rides, and I don't think there's any direct comparison to DHS.
And then yeah, there's some of the lesser carnival fare at DCA that may lack in quality, but make up for it in quantity over DHS.
DCA also has a lot of other little things that round up to a full day experience: The Food and Wine/Festival of the Holidays, Coco/Viva Navidad, The Bread Tour, Animation Academy and Red Car Trolley.
The one thing DHS has that I can't forgive DCA for removing is the Muppets.