Calgary - lost some Oline but they have a habit of reloading and drafting well for now and the future. Lavertu had a year to learn and Peach as a National OL is decent but got squeezed last year to the PR. Their starting 5 OL is still better than some of the other teams around the league. Receiver, as this is the greenest group experience wise they've had in a while, and a potential step back for BLM going into year 2 as a full time starter as teams adjust are the biggest question marks IMO.
Edmonton - 12 wins last year, and that was with basically Adarius Bowman having a monster year at receiver and everyone else kind of being meh (2nd receiver was Stamps and he had almost 1000 fewer yards on the year than Bowman). This year they add Wallace Miles who should have a bigger year with Reilly at the controls than Burris, plus they added Stafford from the Als, maybe AJ Guyton steps up in his 2nd year. Reilly could really have a big year if he can rely more on two or three receivers than just Bowman.
Winnipeg - Don't agree on greenandwhite's comment that the league has figured out Willy. Maybe he's right but there are a couple of issues I have with that. First, Willy was sacked over 70 times last year IIRC plus many more QB hits and hurries, and the defense and costly penalties hurt the team in many games in the 2nd half of the season. Oline should be improved which will keep Willy healthier. Switch to Hall over Etch should be good for at least 1 or two more wins. And some of the penalty monsters are not coming back (for eg. Kuale and his mutiple roughing majors at the worst possible times). Also remember that during their downturn last year there was internal locker issues with the now departed Grigsby.
Sask - They need Durant to stay healthy and there were losses on the Oline. They may not be able to start 5 Nat Oline which may require retooling their starting Nat spots. I'm not as sold on Glenn as a backup saviour either should Durant get hurt once again. 2014 was pretty erratic for him. Maybe it wasn't all on him but he will need to prove that it was an aberration and not that he's hit the downside of his career. They are 4th on my list just because I think they have more questions than the teams above.
BC - biggest wildcard in the West Div. Will Tedford be able to readjust to the CFL game? Some interesting off season signings as well. Any time with Bighill and Elimiminan in the middle of the field will have a good D, but still not sold on their Oline and whether their O will be good enough, especially if Lulay continues to go in and out of the lineup. Could surprise, but I could see them taking a step back as well.
Ham - think they win the division again just because they have the most talent overall and I agree with the assessments on the rule changes which suggest Banks could be in for a monster year. Still, curious to see how their receiver group rounds out. Tasker is back, but who will be the next International receiver option, whether they use Banks at receiver full time or someone else. Fantuz seems to be trending down the last couple of years and they went out and added a few more Nat receivers to the lineup. They have a lot of RBs on the roster for a HC that doesn't tend to run the ball a whole lot, especially in the summer months. And they'll need to find another shut down corner with Breaux gone.
Mtl - Added plenty of veteran depth around the rest of the roster, though being a vet doesn't guarantee you'll make the roster, especially in Mtl. They lost Carter but potentially added more balance to the receiving group with Stamps and Lewis and Giguere is a big upgrade over Deslauriers at Nat receiver IMO. Defence remains strong. Questions at QB again IMO. Their season hinges of whether Crompton continue to build off on his 2014 season as I think only the QB holds them back. If Crompton can't improve or gets hurt, who's next?
Tor - Biggest thing that can derail this season and drop them to 4th in the East is bad news or continuing limbo regarding the team moving to BMO and a brutal schedule that has them playing 2 times at home in the first 11 weeks of the season with a third "home" game in Fort MacMurray, AB against the "visiting" team from just down the road in the Esks. That schedule can bury them in a hurry. They'll need the vets (Owens, Durie, Ray) to stay healthy for most of year, have someone like Coombs continue the development he was showing last year before being knocked out of the rest of the year. And they'll need to find some receivers to replace all the Internationals they lost this offseason. If not, they drop to 4th in the division and stay there and things become that much more miserable in Argoland.
Ott - The assumption is that Burris will be a lot better with better receivers, so now he has them and he'll have to prove it. Personally, I'm not sold on Burris and think he made a lot of just bad throws and bad decisions last year which were only compounded by the fact the receivers were so inexperienced. Defense is decent, this team will go as far as Burris can take it now depending on what's left in the tank. Would not be surprised to see them in the 3rd spot for most of the first half of the season given a more balanced schedule than Toronto, but can they hold onto it and can Burris avoid tailing off in the second half of the season? Sorry, IMO the answer is NO just because I don't like Hank.