Sarge, I'm not a brisket expert,, but I've done a few, and I see two things went wrong for you. The first you already figured out; you need trim a brisket up properly. If you are doing a whole "packer" brisket, the layer of fat under the point can be quite large. I prefer doing just the flats for this reason and they cook a little better, imo. The second thing is that it is mistake to cook a brisket to a specific temperature and call it done. I've had briskets "done" at 197*, and as high as 211*. Every piece of meat is different, so when you get to about 195, just start sticking a probe thermometer in toughest part of the flat you can find about ever 20-30 minutes until the probe goes in like it's soft butter. That is when your brisket is done.
When I used to do brisket the traditional way, I would always FTC for at least one to two hours, sometimes 3 or 4. they don't bleed juice nearly as much when they have a good rest in a cooler. Now that I cook them sous vide and finish over charcoal just to get smoke and bark on them, I don't take them past 160*, and they are ready to carve immediately when I take them off the Weber.
Also, some of the best ones I've done were finished in 250* oven, covered tightly, after they left the stall and had good bark and smoke on them.