I think your defensive line is the most inconsistent bunch, as they can't seem to effectively pass-rush. Playing a team like Montreal, the 3-4 should be automatically abandoned for a 4-3, with occasional bltzes bringing the house. The weakness for AC has got to be speed. If you leave him in the pocket, he dissects your secondary no matter how much effort they put in. If you force him out, hurry him, start delivering hits as he releases, he'll get rattled and Moreno and co. will get the sack more often than not, or limit him to a short gain. He can't scramble as well or as fast as your QBs, Burris, Jarious Jackson, Joseph, or even our Ricky Ray can. Which leaves your defensive game planning as the next more suspected culprit.
Offensively, apart from protection issues, there isn't much necessarily wrong. Just not alot of chemistry, as most of the Ticat recievers excepting Bauman weren't on the roster last year as far as i'm aware. Maybe Richie and Casey have to get the recievers in early for unofficial practices, get everyone on the same page so that when protection breaks down, a reciever can see that and help the QB. I think your o-line looks so bad in these losses because the Cats OC despite having 3 talented RBs this year, run away from the running game when things look rough early. Thus, the O-line never gets that chance to get physical and starting gaining that confidence and chemistry that comes from dominating in the trenches.
Just an Eskimo fan's two cents, I freely admit that my analysis from only having seen Ticat games on TV may be totally wrong.