I think I posted elsewhere, I love the pitching staff you designed if Bloom picks up a couple of fairly decent starters (you cited one from the White Sox and one from the Cubs)--
Sale, Paxton, Bello, + 2 good starters from Chicago
Houck, Whitlock, Pivetta, and Crawford as long relievers
Jansen, Martin, Schreiber, and Bernardino as late inning guys
But what if Bloom doesn't even get one decent starter? I think there is compelling evidence that Cora's improvisations--especially since Sale, Houck, Whitlock, and Kluber went on the freaking IL (and remain there)--have worked wonders. Improvisation isn't quite the right word because the Rays have been using relievers to start for years--as you pointed out.
Plus the math is on Cora's side. We know the bullpen is going to pitch in almost every game, so what difference--in terms of bullpen usage--does it make whether a reliever starts or comes in later in the game?
Last night we did see that not every reliever is ready to pitch the first inning. Schreiber, one of the Sox best relievers, was lucky to escape the 1st inning giving up just 1 run. A weird double play saved him.
Bernardino, on the other hand, seems to thrive on "false" starts and can even go 2 innings. Maybe it helps that he is a lefty and Pivetta is a righty, so opposing managers are less likely to load their lineups with lefty bats.
And this. Right now I don't have a whole lot of confidence in Whitlock, Houck, or Kluber as starters, so their returns might not help the rotation much. If the good Sale returns, that's four good/decent starters plus one good/decent false starter.