I realized why my annoyance seemed so familiar: Nick getting LaCroix to wipe Tracy's memories of Vachon's death after 'Ashes to Ashes'. I really hated Nick for that.
And I still don't think it makes any sense. Maybe her family won't talk about it, but what about all the time she's been gone and what will her friends say? It's just there's so many other things they could have done, but they settled for a memory wipe. Very weak storytelling IMHO.
A bit later as I continue to ponder...
It would have been better to put her in a situation where she wakes up and they tell her she was in an accident and do the 'you have amnesia' thing. I still would have thought it was crap, but it would hold up better than what they ended up doing.