Angle torch attaches to the shoulder strap of your LCE and provides forward light during march without you holding it and also makes you more visible. Also the design is more natural to hold if you have to. It won't roll down the table and they can be stand upright. Also usually you have colored lenses already supplied with it so you don't have to go and hunt for them (aka spend extra cash). Something really usefull that I was told when training in urban warfare is that when peeking from the corner you expose your head (unless angle mirror is used) and your hand (if using regular flashlight). Enemy will aim at the source of light. Using angled torch allows you to see and not stick out your fighting hand. Also when signaling from the trench you don't have to expose your hand. I saw a AA version of those lights which were very cute.

Yes they are heavy and they need to be redisigned but they work so I don't think military is in the rush. Especially since so many soldiers go out and buy their own lighting systems out of their own pocket.

Matt