Excuse me the interference and if I talk in english (which is not even my mother tongue, sorry again).
Just to let you know. You can use the mini pci-e port (removing the wifi card) to put another extra 4 ports (apart from the six that have the motherboard) with a xpenology compatible card like this:
https://www.ebay.de/itm/IOCrest-4-Port-SATA-III-Mini-PCI-e-Controller-Card/362446320526?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
and using a extender if you want like this (because of the location of the wireless card in this particular board) :
https://www.ebay.de/itm/Mini-PCI-E-to-Mini-PCI-E-Extender-Cord-Wireless-Network-Card-Extension-Cable-F7/223031480332
This card is used in the following xpenology configuration:
https://de.pcpartpicker.com/b/MfkdnQ
So, now having 10 sata ports, you don't have to sacrifice the 10gb NIC (no need another slot, you have already 2 removing the onboard wifi, which is useless).
And you are right, the motherboard is awesome and future proof (as per today -not talking about older motherboards- is the best mini-itx motherboard out there of the current generation if you don't want to overclock, with amazing price/quality balance, as I compared all of them in the market -asrock, asus, gigabyte, msi- before buying it).
I am also in the process of doing my own xpenology based this board (I have it but didn't start with it, just waiting for the next 6.2 final loader and drivers).
I hope I could helped you in any way.
Greetings,
E.
P.S.: By the way IG-88, you are doing an amazing job, thanks!