With other boards situation is not much better. People constantly complain on Rampage 5 Extreme.
I had pure suffering first days to force board to OC CPU at all. I had constantly BSOD when I change setting for overclocking with few other people with completely and absolutely identical situation as mine. Many users back Rampage 5 Extreme because many bugs... I advice you only to take look on Newegg and compare user experience for example some EVGA PSU 1000 P2, 1200 P2, 750 G2, EVGA GTX980Ti, TITAN X and on other side Rampage 5 Extreme... You will see what mean nice products and what mean buggy product. From one difference here you will get fast respond and many advice and with other manufacturer you need to pull with nippers every answer from their mouth.
And I still don't know is it my mobo OK, I set everything just like I want... but off course I will try when summer pass to OC CPU more...
I only know that memory both kits are OK... CPU is very rear fault... and that sold me guy who work in ASUS Serbia...
Some manager for Balkan or I don't know... If sold me fault processor I will kill him instantly

And if you think that only is Classy make problem you are wrong... and same situation is on every forum... X99 have more problems than X79.
Some people are happy because they change on MSI, some because change on ASUS, some with GIGABYTE, it's always like that.
OK In my case X99 and 5820K now work as I want, but all of us want to everything work, it's not point to set some settings and than to scare to change.
But when you have problem on one side than you have experience that with others situation is perfect, but not and with different brands/models people similar as you have own problems and think same for you.