I’m actually OK with the current combat time settings. Aggressors can’t set a time/day the defenders cannot form up during, and large structures can’t be completely TZ tanked. Raitaru tier structures can be TZ tanked much more effectively.
What’s missing is a loot incentive to hit structures.
Kill a 3b freighter and on average you get 1b in loot or so. Kill an 11b freighter, get 5b (typically, variance will hose you sometimes)
Kill a 3b structure, and you get almost nothing. Kill an 11b structure, you still get almost nothing.
Contrast to the old POSes, where you could kill one and then find out it had 50b worth of materials and blueprints in it, and get to loot half of them.
There’d be a lot more structures dying even with current TZ rules if aggressors had a chance to reap rewards. At the moment, HS structure battles only occur over moon control, trade hub control, grudges, or (occasionally) over system indexes.