The bottom of the Jays lineup isn't very impressive from an offensive perspective. The team is clearly built on pitching and defense. That said, you're correct that the bottom of the lineup for most teams, even contenders, are often full of guys who are at, just above or just below league average at the plate.
Bottom of the Phillies lineup, with Steamer wRC+ projections in brackets:
Stott (100)
Bohm (107)
Marsh (98)
Rojas (83)
Orioles:
Mullins (103)
Hays (105)
O'Hearn (105)
Westburg (107)/Urias (95)
Mateo (82) - unless Jackson Holliday starts
Even the Dodgers (greatest team ever created on paper):
Teo (110)
Outman (103)
Lux (109)
Heyward (101) / Taylor (91) / Margot (99)
Jays:
Varsho (106)
Schneider (113) / Biggio (99)
KK (91)
IKF (89)
There is little doubt the Jays offense is only going to go as far as the stars take it. As of right now, our offense is probably 7th-12th overall, based on the expectation that we get bounce back years from Springer, Kirk and Vlad (whom are all projected to do so). If we're going to become a Top 5 offense, we're going to also a couple of guys to breakout or overperform. That would likely be Bo, Jansen, Varsho or Schneider.