It depends on what you are optimizing for and where you are optimizing for. Standard and Daylight times have different meanings in different sides of the time zone. On Eastern edges of a time zone Standard time truly is more "standard" with respect to solar noon. On Western edges of a time zone Daylight time starts to be more preferable and closer to solar noon. Half-hour between the two might favor the "middle" of the time zone perhaps and/or it might just leave all the populations on either side of the time zone unhappy.
Arguably our timezones have grown too wide to accommodate preferences of both edges. Our timezones were optimized for train schedules and full hour-wide zones made some sense based on the speed of train travel. Maybe instead of trying to pick just "Standard" Time or just Daylight Time we should instead be talking about narrowing our time zones (to half-hour wide, perhaps) and better figure out what geography we are best trying to represent versus solar noon, the center of a timezone, one edge or the other.