Seasonal hours are indeed more expressive than DST. I love when times are indexed in terms of "sunrise" and/or "sunset" such as the parks near me.
But it doesn't mean that it is simpler for regular people to implement in their lives. If every shop, school, and office had seasonal hours that changed at different times of year (even if they were posted in UTC) then trying to coordinate errands would become a lot more complex. This week I have time to pick Timmy up from school and swing by the post office before it closes, next week school shifts later so I can't, but the week after that the post office implements their shift and I can again.
But it doesn't mean that it is simpler for regular people to implement in their lives. If every shop, school, and office had seasonal hours that changed at different times of year (even if they were posted in UTC) then trying to coordinate errands would become a lot more complex. This week I have time to pick Timmy up from school and swing by the post office before it closes, next week school shifts later so I can't, but the week after that the post office implements their shift and I can again.