This is one problem presented by Star Wars: The Old Republic. It has been stated many times that Bioware is trying to make our characters similar to iconic heroes (and villains) from the movies. Will we inherit the same weaknesses as the movies, or was the fact that the armor made the stormtroopers anonymous henchmen the thing that killed them, rather than the weakness of the armor itself?
Another problem I can see form with armor is the continuation of the trilogy with a "Tank" to get the most armor on and just stand still while a Rancor will crush him into the ground for ten minutes. Along with the extra mitigation it provides, it will also make balancing for pvp more difficult. Will it make the wearer slower than if he wore cloth, because it would be a huge burden on the classes that need armor to function while making an advantage for faster people. Who knows the answers to all of these, perhaps we may get answers next week from Germany. As far as where my bets are going, it will likely be similar to the armor classes in KotOR as well as WoW, yet with more focus on trying not to get hit in the first place.