Agree. Cora has made a huge difference.
Now, with 11 games to go, the Sox have these strengths (in addition to Cora): remaining schedule with extra days off and mostly weak (except for the NYY) opponents; hitting (3d best OPS in MLB); bullpen (thanks to Cora and his pitching coach); and an improved defense thanks to Kike back in CF, Iglesias at 2b, and an improved Dalbec at 1b.
The weaknesses are the rotation and the fact that the bullpen, which has done yeoman service all season long, is not rock solid. That means that Cora gets to make a lot of big decisions on when to pull his starter, when to insert a long reliever like Houck, Whitlock (now day to day), or Richards, who (and when) to send in to stop the bleeding, and who to close.
As good as Eovaldi has been this season, his latest start--5 innings, 3 ER's vs. the lowly Orioles--underscores the importance of the bullpen, the hitting, and the defense. #2 starter Sale is still a superb craftsman but does not yet have the great stuff or velocity he had in 2018. #3 starter in my opinion is ERod because he has been better in Aug-Sep than Pivetta.
Thus, while I now think the Sox are a good bet for the postseason and could even get beyond the wild card game, I think weak pitching overall will make winning an ALDS series, probably vs. the Rays, problematical.