I agree, bark on brisket isn't like bark on pork. A layer of flavor maybe, but not "bark".
Last one I did, I foiled after about 8-10 hours and let it go for another 6-8 hours, only because I'd been fighting rain, wind etc. overnight was was too tired then next morning to want to pull it off.
I drained off and reserved the au jus and pulled the brisket off. I really couldn't slice it, it was like pot roast. That sounds wrong, and I felt the same way, until I ate some. I cooled and pulled the fat off the au jus and even used some of that over the meat.
I had some folks that didn't know what it was but could not eat enough of it. It was that good! I now call that my Texas Pot Roast, although my rub really added a little more flavor, the result was awesomeness!
I'm doing one this weekend but don't plant the Pot Roast route this time, but I will purposely do it again. I vacuum sealed and froze a bunch of it up and it was just as good reheated later, and just as baffling to people eating it as fast as they could.
So, foil or not, a good piece of meat can do without, or it can be something different.