Walls - Creating new strategic points

In my opinion, walls should be way more important than they are today. In my personal experience, building "pressure" walls or trying to cover big spaces really doesn't work because walls can be broke very easily nowadays, since you don't have to actually destroy the unit, just attack it.

If you watch any experienced player you will see a default behavior of making three man walls (with always 1 troop on each side) in every important city, while rarely using it for blocking especific passages or surrounding enemies positions.

So, I think that walls should work like they were supposed to (at least I think they were meant to be that way). You wouldn't be able to break the wall if you don't destroy the troops on it's sides. Which would make people actually reinforce walls and give a new dynamic to the matches.

What do you think?