I've been tempted to try the brown butcher paper wrap on a brisket but I just haven't done it yet. I have a huge roll of the brown peach paper just waiting. I'm pretty much a straight forward wood, fire, food guy. I burn oak and apple splits to provide the heat and smoke. Ribs don't get foiled nor does brisket. I do pan my pork butts at 165 but that's because I can't stand to listen to all those great juices sizzling off my tuning plates as they render out of the butts.I want those juices so I keep them in the pan. I will sometimes place a foil tent over the butts if I need to give them a little push through the stall.
I use to foil everything, have all sorts of wires running out of my smoker thinking I needed to know the temp of the smoker and the meat from the very start to the very end. I can tell you I enjoy the process and the end result much more since I went back to just basic, simple smoking food. I can say I have never once injected a single piece of meat with anything. I always figured if you punch a hole in a piece of meat to put juice in it will run out the same hole!
I have always been able to achieve the flavor profile I want through rubs and or brines.