I agree Disney has done a good job adding attractions to the park. Of special note, there are finally rides for families to go on. When we went to WDW in 2016, we completely skipped HS because there was so little there for kids.
I think there is still some work to be done in terms of adding non-headliners to the park. Right now, a big part of the choice is based on popularity, scarcity, and wait times for only 4 rides (SWRotR, MFSR, SDD, and MMRR). I don't need two or three days at HS because there are so many things to do; I need more than one day at HS because it's so hard to get on the attractions there.
In terms of attractions, I also think AK has so few rides that it can be a one-day park. However, because of other things like the animal trails, it can also be 2-3 days at a slower pace if you talk to CMs about their home countries, watch the acrobats, etc. HS doesn't have that to the same degree (and, yes, I'm still salty about the cutbacks to the Citizens of Hollywood). I'd like to see HS step it up in terms of things for us to do while waiting for our FP window to come up.