That right there is a complete show stopper, IMO, and a very strong indication that this particular product is unfit for purpose. This kind of an issue on a product with a price tag in the $4K range is unforgivable.
GPU manufacturers can keep a 2-slot card going flat out at 300W with their active cooling solutions. If VCU1525 cannot do the same with 150W power limit (1x 6-pin + PCIe at max 75W each), that indicates a very poor design. I am very glad I waited for initial feedback before I ordered mine, and in light of this I won't be ordering these at all.
Has anybody got a line on pricing and availability of the mentioned Bittware VU9P card that will be fit for purpose out of the box?