if i could sugest you one feature for that PSU (that i want to purchase for myself) is the voltage terminal's layout.
Most of the non-direct plug PSUs we usually see here on the forum have that said voltage terminal's layout in such a way it's never possible to use simple/standard cable extenders to connect the PSU to the mobo and expansion cards.
With that in mind, the amount of work and care to do custom cables for a PSU with such feature would be incredibly reduced, setting us free to focus on others aspects of the PC, as a whole.
So, here's my humble suggestion: mirroring the mobo's voltage input layout, like this:
I understand it could be not feasible or a hardly/costly option, but it is something, IMHO, that adds value to the product and eases the life of low skilled guys like a few of us (me included).