I'm also tweaking my DE lists a bit for better optimization. The "Venomwing" changes are purely cosmetic and will just streamline things. My other list is still in flux, however. While the list has become more pleasing to me with each new change, it is still in a process of evolution. While I believe myself to be happy with it when I'm done, I realize soon afterward that I'm not 100% yet. Each list is surely competitive, but getting the perfect mix of units is more difficult than I had realized. But we're getting there. :)
Over a month with the book and I'm still not settled on a list. I suppose that is a good thing. Shows that I'm not settling on an old codex build and that the new codex contains numerous builds depending on your tastes. And I'm still trying to create a list that makes use of Incubi that works. They are good, but they unfortunately take up Elite slots, which means no Trueborn. One of these days I'll make a breakthrough... ;)