Still in it: Durability of the starting rotation
Yes, it is entirely stating the obvious that staying healthy is important, but it still makes it no less important. As an extreme example, the Mariners starting rotation did not miss a single start through injury last season, and they ultimately ended the longest active playoff drought in all four major North American professional sports.
Along these lines, the Blue Jays rank first in innings pitched by a starting rotation. Kevin Gausman leads the way with 82 innings, which is the most in all of Major League Baseball this season.
The durability of the rotation has resulted in them ranking fifth in the league for wins and ninth in ERA. Toronto is also first in strikeouts and sixth in opposing batting average.
It hasn't all been smooth sailing however. This is best evidenced by the Blue Jays ranking 11th in WHIP and giving up the sixth-most walks and home runs among all starting rotations.
On the whole though, there is a lot to like about the starters, save for Alek Manoah. If they can remain relatively healthy for the remainder of this season, the Blue Jays will be well-placed to once again win 90+ games.