About a year late to the party here. One suggestion that I think is necessary is having bottom intakes. I think the default orientation of this case is the upside down one and not the ideal. Having a 240mm rad up top exhausting and two 120mm on bottom as intakes is the way to go. Without the bottom intakes not much if anything is going to be improved for cooling on the gpu. The cpu will greatly benefit in this case vs the a4.
I like the idea behind the design, but I have concerns that it's not actually solving the core problems of the a4. The a4 works well for mid end systems. For high end systems (unlocked Intel i7 k series CPU and high powered GPU like a 1080 to) it just falls apart with awful thermals, throttling, and noise. Cooling of the CPU has been addressed, but the GPU still needs more love. The GPU needs more air. It needs more space. Up to triple slot width. This is essential especially now that we know Nvidia has abandoned the blower style cooler for their reference design. Some blower style cards will still exist, but they're just not good in any way for high end cards. Let the a4 be the case for ultra compact and make this one the true case for ultra high end compact systems.
As an example. We already know that the Asus strix rtx 2080 will be 2.7 slots. Other than EVGA all the high end 1080 Tis are 2.5 slots. These high end cards are getting huge. However, those coolers are excellent. No reason why we shouldn't be able to build a compact system with such a GPU. This is why I haven't built a mini itx system for myself in so long. All cases create awful thermals, throttling, and noise for actual high end cards with most not even fitting these big cards.
You could always use the hybrid card design with two 120mm radiators. One radiator for the CPU and one for the GPU plus the GPU would have a blower fan on it at the same time. I think this case has enough cooling capacity to keep both the CPU and GPU at reasonable temperatures, even when overclocked.