Before:
In the Old way of thing, I had 2 available angles to work with and it seemed a little more immersive than just your regular top down visual. Given some tile shading I could show certain layers and heights. While it worked well, it is way too much effort to make 5 icons for a single tile. (The main tile, and then each corner piece.) After looking up how to do isometry on byond, I find that this can pretty much eliminate everything I've done and make it much simpler.
Now:
My only complaint about this is the client view size. In the old style of this, I could do a fullscreen (1024 x 768) Interface and have it go off without a hitch. In Isometric, I can only do a little less than half that. I don't mind too much as the pros outweigh the cons greatly in my perspective. Less icon work for me, easier ways to handle height and it's much easier to do big icons this way.