Which Armor?

So, there are two simple methods to incorporate light, medium, and heavy armor into the game.

Method 1: Bring back the armor chart from 3.5

Method 2: In the 4th edition rulebook, there are 6 sections of armor.  Divide the first two into light, the second into medium, the final into the heavy category.

I'm leaning towards the former method.  The categories are already extant, and there's a very clear progression in how characters' armor improves in a few ways when he's able to get new stuff.  Full Plate giving 8 AC and +1 from DEX is pretty nice.  It also gives several different kinds of shields, each of which begs to be circumvented by a flail.  Naturally, just about everything concerning the MMs would have to change to incorporate this difference, but I think that it would be worth it, and not require too much effort.  If nothing else, just use it for humanoids that wear armor, and you're good to go.