Car Horns? No. Bicycle Horns? Hm... No. Barking Dogs? Maybe in Octaves. Hungarian Scales? Maybe... with consideration. [:P]
I'd expect something great that VSL can do in the future with Dimension Brass. I'd like Mutes choices for this and more articulations for it. Dimension Brass is already good on what it does. It is great to know that Dimension strings will have Con sordino library, but I'd love to see Dimension Brass with Mutes. Multiphonics are indeed something that I would like to see in the future.
For Woodwinds, I'd expect a Bass Oboe for a next library, but I don't know. Heckelphone is quite sufficient indeed... Furthermore, I'd like to see a 2nd Clarinet and 2 more Clarinets but in A. For Brass, more mute choices. A reminder that this is just a wishlist.
Vienna Imperial Half-Pedal is a "must" that needs to be there. Not trying to be arrogant or meanie face... [:)] A good piano sound needs half-pedaling for realistic purposes and we all know that.