You are allowing it to get too cold if it is fluctuating down to 205F, that is killing your cook. Personally, I would pull it and stuff it into the oven at 400F and get it done. Raise the pit temperature to 300F or more. You can wrap, I would add some apple juice or liquid, foil wrap, that will help.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
Whip It Off, Chambers!
"perhaps...but then again...maybe not..."