They had both. A glass panel and a crystal... pedastal thing for that stone statue.
I haven't seen the movies in a while, so please excuse my ignorance.
Incoming rant/WORDS!
The problem is that there seem to be at least some inconsistencies with regards to the lightsaber. Obi-Wan cut right through Ponda Baba's arm, and Vader cut off Luke's hand without any noticeable resistance. It slices through most weapons easily. They've also had several instances (in the EU at least) where lightsabers pass clean through most normal materials, including stormtrooper armour. It cuts through most droids without any trouble at all. Then there are other cases where it seems to react like a different beast altogether. With the example you gave, Yoda's lightsaber apparently just sticks out of a trooper like a regular, metal sword stabbed through someone, and I think I remember there being other examples like that. As for the Qui-Gon/Maul thing, you could argue that either way. Did Maul shut the blade off before Qui-Gon fell, so that it wouldn't slice through him as he fell? Or did Qui-Gon only start to fall after Maul shut the blade off?
Looking back at the history of Jedi games, this isn't the first game where the lightsaber basically just acts like a giant baseball bat or a standard sword. In the Episode III game, the saber acts pretty much the same way as in this new trailer. In the KotOR games, it usually just acts like a regular sword, which some people explain away by saying that lightsabers were really underpowered in that era. But, that doesn't line up with the KotOR comic material that I remember. In the games, you have to deal with the issue of balance. If everything was a 1-hit kill with the saber, or even "realistic" (hit a body part and it gets cut off), then it would probably make the game exceedingly easy. In pretty much every game that uses the lightsaber in some form, at least some of the enemies are able to stand up to multiple body hits with the lightsaber. I realize that they have to figure out some way to tone down the overpowering strength of the lightsaber, but I just wish that they didn't treat it like a freaking club against cannon fodder enemies like the stormtroopers. Then again, I guess they probably have to deal with the whole "T for Teen" rating aspect, and I have no idea if severed human limbs fit with that. Obviously severed droid limbs are fine, though, considering that's in the RotS game.
Translation: Hurrr de duurrrrr huuurrrr.