Cheap castles and walls are big in multiplayer - they can be whipped with 1 pop instead of 2 which means they can go up "instantly" and that extra turn can mean getting an extra defender whipped as well.
The other "big" deal with protective in multiplayer are free upgrades to resourceless units. You can't be pillaged into being totally helpless. It's largely meaningless in single player where a human player is almost always on the attack, but you don't always have that luxury in MP. The change to Drill allowing you take Shock or Cover after Drill 1 is especially important in that regard.
The other "big" deal with protective in multiplayer are free upgrades to resourceless units. You can't be pillaged into being totally helpless. It's largely meaningless in single player where a human player is almost always on the attack, but you don't always have that luxury in MP. The change to Drill allowing you take Shock or Cover after Drill 1 is especially important in that regard.