Quite the opposite. I would watch for swaps of CRJ900’s on to longer range current Express 175 routes out of YUL with the 175’s doing more of the shorter stage length domestic and trans border routes in the east.
There are no plans for 175’s in the west. AC removed them years ago for operational reasons.
Most telling predictor of the future of the Express jet fleet will be whether the 76 seat jet portfolio ever increases (currently 46 and well below any ACPA scope fleet limit) and whether that increment is 175’s or CRJ900’s or both. On another note - increasing jet fuel pricing is making the continued operation of the 50 seat CRJ’s much less economical for AC. However, the Q400’s are not a viable replacement aircraft for trans border city pairs out of YUL/YYZ.
AC just sold and leased back the remaining 190’s. However, they will NEVER be placed at Express (ACPA scope limitation).
Notwithstanding the extended CPA terms at Jazz, Skyregional, and Georgian - I would watch for fleet changes at Express. The plan circa 2018 will not be the same as the plan circa 2020 and beyond. Too many external factors that will dictate review and modification.