I have no idea why everyone is so hard on the Asrock H110 Pro BTC+. Its a great board.
I have 10 of them running with different configurations, from 7 to 13 cards and I have not had a single problem related to the motherboard.
It is pretty much "plug and play", the only bios setting to be changes is to boot automatically when the power goes out.
Disclaimer, I have not been running it with 8 vegas, yet. I get my Vegas the coming week and will then build a 10 GPU Vega build using this motherboard.
Good luck!