I think reports of Nola's poor season are still somewhat exaggerated. He may not be - and likely never was - the #1 of 2018 but his FIP this season is pretty close to his career average (and guess what, our fielding stinks), as is his WHIP. He's also having a career low season in walks, and his strikeouts have been up the past two years. He's just been more hittable. Maybe there are some granular numbers that illustrate a pattern or time frame of struggles that is more than just ups and downs, but a 2-2.5 WAR pitcher is still not marginal in any way. And it's not like we don't know what the marginal guys look like this year!
Would take a very brave and not blindly loyal manager - neither of which is the case with Girardi - to not still start Nola in Game 2 or 3 of a playoff series. If it's even a question hopefully that will also be because Gibson, Eflin and Suarez actually look that good.