I don't think outposts are something I would miss and definitely don't want to see more of them. In a contested fight, outposts can be a determining factor because they're not only a buff to one side but also a nerf to the other if they don't have them. Many nights will simply be riding around the map for freeps flipping OP's where on creepside a warg mapping around can do it solo. If both sides get caught up in this side game it's just a lot of time wasted on pointless pve.

If they were kept in game as quest rewards without the damage buffs, or their defenders buffed so it would at least take a six man to defeat them it would feel more aligned with the idea of fighting over objectives. Currently they're just swapped back and forth unopposed at the cost of a lot of riding around.

And also as smoke signals to the other side that we're out there because castles AUTOFLIP so they are no longer any indication of the enemy's presence.