The only ones who can do harm now are the writers.
The basics are there, perhaps not very courageous (I would have dismantled the Post Office and kept the Blacklist described in Nachalo, with the 17 technological offices around the world) but finally all the characters have space and importance, Red is no longer the sick grandpa of the past two seasons and everything portends action, fun and introspection on the private life of each of them.
This episode screams "fan service" in every scene but that's exactly what the viewers want, including the irony.
Megan Boone wanted to leave and will discover, as happens to everyone in life sooner and later, that she is not indispensable.
The Blacklist had been spinning on itself for a couple of seasons due to its own mythology, now it can finally explore all those aspects that already made us love it (the blacklisters, the task force, the intrigues, the mysterious and fascinating Red's life) but which were becoming less important because they needed to make room for Liz's life too.
It is too early to claim victory but the path is right.
