The Blue Jays have lost Merrifield (arguably played too much), Chapman and Belt and are hoping that internal improvements offsets that. While expecting better years is fine, if the reason that the guys didn't perform hasn't been resolved (cough, the baseballs, cough), then expecting more is stupid.
The big issue with the offseason is adding redundant pieces, though if Toronto has a starter not named IKF/Espinal/Biggio at 3B, IKF is actually a better backup candidate because he plays more positions and is an exceptional baserunner. Kiermeier would be fine if the Jays had a masher for LF, but Kier and Varsho is two glove first OF (which again is fine if the Jays had a basher to share LF).
Where everything falls apart is when the same backup is the starter somewhere else. If Babe is the 4th OF and the lefty masher, then he shouldn't also be the starting 2B (this problem is mitigated if one of Biggio/Espinal rebounds huge or if someone steals the 3B spot so that 2B is something like IKF/Biggio when it isn't Babe).