They surveyed in great detail early on when people used poor internet photos to claim that it was toppling over. The variation from square/true was minuscule (still within tolerances for a new building). Of course, when those variations were reported, the internet loon-mill translated it into proof that they were right all along. That the building was in danger of falling over with the next strong gust of wind. Multiple earthquakes since then (some fairly strong) have not done the least bit of damage... but they are undeterred.
Structural engineers have confirmed that even another quake as large as the one that started the whole chain of events, would not endanger the building or the SFP.
Tepco has shored up the building,
Actually... no. They added additional supports under the pool even after they confirmed that there was no structural damage to the existing supports. All they've done to the building itself is remove debris and cut away pieces that would have obstructed their ability to get to the fuel.
Tepco confirmed the Reactor No. 4 fuel pool contains debris
Wait! What you're saying is that when explosions blow debris into it he sky above a pool of water... some debris ends up in the pool? Goodness... that's shocking! 
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