Warning: Spoiler Alert
It seems to me that the writers are getting a bit lazy ... or at least, it seems like whoever wrote this episode got lazy. There were too many elements of this episode that felt like they were lifted directly from The Devil Wears Prada. That's fine if they wanted to do something with the fashion industry ... again ... but is it too much to ask if what they present to us doesn't smack of not bothering to think of something original? I don't think that it is.
Also, the whole thing with the employees having their homes bugged without their knowledge ... that does not sit well with me. It's a fucking fashion magazine, not anything important that would warrant needing surveillance. And just cuz the Dragon Lady wasn't the one who had done the killing doesn't mean that she wasn't doing something that was illegal (regardless of what the fine print might have said. Even if the fine print protected them while they were spying on the assistant who was murdered, her roommate didn't sign any employee wavers that would have made it ok for them to listen to her phone calls. So, even if she wasn't the killer, I still would have liked to have seen her have some kind of charges brought against her for all of the phone calls that were being listened to for which they didn't have those wavers for (and for each person who wasn't an employee to be able to bring up charges). Yeah, I'm not at all cool with breaches of privacy (no matter how someone tries to spin it).
It felt far too convenient that Beckett just happened into a dress that fit her perfectly (and which looked pretty good on her). She doesn't seem the type who likes to go clothes shopping (especially shopping for dresses), and the writers may have wanted to try and not waste time on that, but it feels a little too unlikely that she would just happen be given a dress that probably cost a crap ton. Also ... I don't recall her saying anything about getting married while she was in the company of the Dragon Lady, so how would it be known that she was getting married, or that she still needed a dress? I have a feeling that some things just aren't thought all the way through, and it might be a good idea to have a beta reader go through the script before it's presented to the head writer.