If you pull out and have to "reholster", that usually means strip to the Qwikie Mart! I mean, really, who carries more than one? An optimist?What do you do when you need to reholster after you pulled? Walk around with a gun in your hand or go find your tactical rubber band?
No cover for the trigger on a striker fired gun = fail.
No cover for the trigger on a revolver if the holster isn't also holding the hammer down and molded to keep the cylinder from spinning = fail.
WTF are all these people who are bothered by the weight of a holster? Oh my gosh, this kydex/leather is soooo heavy..