Okay, for starters, fake screenshot is fake.
Moving on: it's very important to some on the team that the look and feel of characters tend to gravitate to match their classes - this concept of gravity is the important thing. While we do want to allow a certain amount of freedom in letting people choose a visual look for themselves, we also want to be sure that the easy path, the path of least resistance, ends up with people looking like Star Wars. This was, and remains, an important goal for those of us doing itemization.
Along the way, we've tried a few things. Incidentally, 'tried a few things' is one of the reasons we tend not to tell you guys about features until we've tried them out a bit - many ideas that sound good on paper fail in practice, and we prefer to weed those out before, say, people get attached to said failed idea and get angry because we took them out.
One of the things that we tried was gear that morphed when you put it on, so if a Trooper puts on armor statted for a Jedi, the armor would suddenly look like Trooper armor. This ended up being disconcerting to a lot of people playing the game: icons didn't match, for example, and gear that looked lame on you would look awesome on your companion character, which felt pretty sucky when you put it back on you. ('Felt sucky', incidentally, is code for, 'bad designer, no cookie').
Our gear now is settling in a pretty good state, in my opinion. We've taken the coolest and most emblematic armor, first off, and made it class only.
For the rest of the armor, we are following a reasonably standard RPG model of heavy, medium and light. Knights and Troopers both chase heavy, for example, but care about different stats. Armor with Knight-favored stats looks a closer to the Jedi ideal, whereas armor with Trooper stats looks more like the Troopers we know and love.
Yes, you can put on some vaguely 'Trooper-esque' armor as a Knight, but your stats will be terrible, thus the gravity of, you know, being good at your class is going to mean that it's rare.
And let's not forget that there is social value in seeing a Knight in vaguely 'Trooper-esque' armor - you know he's probably terrible at his class, and you probably shouldn't let him tank.
I've been playing our test server a lot lately, and I can tell you right now, people who are concerned about this are worrying too much. Our Knights look like Knights, our Troopers look like Troopers, and our players by and large are ending up with appearances that are appropriate for the class.