I do not believe it is - in fact when you build in it in the manual I think they recommend you not take the front glass off unless you really have to.
There are two modes, high and low for the motherboard. I agree it would look nicer a bit higher up but I put it in low mode so I could accommodate two exhaust fans in the back. The bottom and radiator are both intake and one exhaust felt like it would be pushing it.
I feel that, once you’re in an eco system sometimes it makes sense to stay that way