Yes, I love the idea of a storage space. It's fine if they make it limited storage, but being able to perhaps store one or two AWs in order to make room to build different ones, or store some items while you rearrange your city would be so helpful.
I understand if there's a set amount of city space that we all get. Make some buildings un-storeable (like the MH or the Magic Academy, etc), but let at least some of the AWs, manufactories, & culture buildings be put into storage. That way, we're all still working with the same amount of space (keeping it fair), but we get to decide what buildings we like the most. If we can store AWs, perhaps more people will build them as part of quests or even pay for more runes. At this point, space is such a premium in my own city that I don't have any AWs because I only want to build the ones I really, really want. I've got plenty of runes to build other Wonders but don't want to due to space. If I could store an AW, I'd probably build them.
As far as alternative building looks, I think it's important for the Developers to keep in mind that although players play the game to move forward, aesthetics are important to many of us also. It's part of the fun to create a beautiful city & have everything look nice. For example, I'm probably not utilizing my own space as masterfully as I could, because I like the street layout that I've got in my residential area. I'm sacrificing space for what I consider beauty, & I know I'm not the only one who chooses to do that at least in some instances.
In regards to Orcs, I'm not there yet. But it seems to me like it wouldn't be difficult to create some kind of "glamour" spell that people could use on some of their buildings. I know not every "race" is going to be elegant or pretty, and not everyone wants that anyway. But, for those that do care, offering them some way to keep some of the looks that they like will keep them engaged with their city & still playing, and isn't that the goal for Developers?