I think it looks great. You could leave the steps as is though I think, although it would depend on what kind of style you're shooting for. If you make the steps to scale, they will barely (if at all) show up on unit like that. The steps as they are now should show up fine, and give the clear impression that there are…
looking good. first thing i noticed was the scale between the steps and the rest of the model. the steps are really huge compared to the entrances, if you had a human model climb those stairs, he would need to have really really long legs...or an elevator.