The program leaders get a pat on the back for acting promptly and with safety in mind.
My guess is that the test fleet should be back up (probably with special inspections) relatively quickly, with Eglin and Yuma following later because, frankly, they are not on the critical path to IOC. Whenever that might be.
Note that a blade in this stage failed before, in 08 (delaying first flight of BF-1). It's also an unusual design because the LPT has the job of driving the lift fan as well as the engine fan and is consequently providing about two-thirds of the T/O and landing thrust.