"the E190s' grounding is the latest setback for JetBlue.."
I'm not sure I would have said this. If anything, the temporary grounding of a couple 190s for software upgrade will assist the company for future operations and will only affect a handful of daily flights. The imperative software fix will greatly improve dispatch reliability of the aircraft.

Please note I am posting this on my personal behalf, this is not an official posting from JetBlue.