I like that HUD info, except that it covers the middle of the city. What I'd rather is that it's always at the lower extent of the city structures. So if you start building "down" the screen, the HUD info moves to be below that area. And if you rotate the view to another angle, the HUD info keeps riding below the tile that's "nearest" the player. I think it would be nice if it was semi-transparent as well, but maybe just less scaling for the HUD would work. As it is, it feels like it can take up an awful lot of real-estate.
In the realm of "things that get in the way"; trying to click on something that's in the lower right hand corner of the screen can be frustrating since the info card can pop up, covering the unit/object. I'm not sure what the best way to handle that is, since accidentally covering up some other piece by moving the card might not be ideal either.