*The biggest news of January 2nd wasn't what the Astros got, but what they lost - specifically, Will Harris, to the Nationals for 3yrs/$24m.
So let's recap what the Astros lost this offseason (with 2019 fWAR in parentheses):
Gerrit Cole - 212.1IP (7.4 fWAR)
Wade Miley - 167.1IP (2.0 fWAR)
Collin McHugh - 74.2IP (0.5 fWAR)
Hector Rondon - 60.2IP (-0.2 fWAR)
Will Harris - 60IP (1.1 fWAR)
Not only is that 575IP that has to be replaced, that's right at 10.8 fWAR from a pitching staff that won 107 games.