I'm feeling the same. Did the upgrade from 10U to 11U when I saw the sale price, and still trying to figure out if it was justified...
1) Una Corda is interesting, but not really very compelling. It might be of use here and there, but that's it.
2) I do like -- and use -- the Strum library, so the new one is a nice addition.
3) I'm not sure, yet, about Emotive Strings -- I find Action Strings to be a bit plastic and artificial, and is hard to blend with my other string libraries, and Emotive Strings has very much the same sound and overall vibe. I'll spend some time playing around with it, and hopefully it will be useful. But I'm not optimistic.
4) Symphony Essentials: don't like the woodwind libraries at all, and the solo brass doesn't sound even slightly convincing, to my ears. The ensemble strings are okay, although they always struck me as being a bit too shrill with a lot more bite than my other string libraries, and I don't like any of the short articulations. The ensemble brass has been useful, although I didn't like it at first. However, after experimenting with it a bit, I actually don't mind it as a quick and easy way to insert some massed brass instrumentation. Taken as a whole, the Essentials collection is pretty underwhelming.
5) India I like, and will use. A decent addition.
I already had Replika XT, and I've haven't really looked at Reaktor 6 yet, and to be honest, I don't use the NI synths very much. Not sure why, but they have just never really grabbed my attention, so I've left them alone. Possibly I should change that..