Rather positive review (even if it helps having a Shogun...) but the question is: Was this a pre-production model? The NR performance is something I've heard has been improved in production..
4:2:2 is supposed to give you higher quality when grading, and it's often a requirement for broadcast work. With the GH4, RX10, A7S and A7R II, you need an external recorder to get 4:2:2. XC10 records 4:2:2 internally both in 4k and Full HD.
Even if the RX10 II seems tempting, the question is how cinematic its S-log2 will be compared to the C-Log of of XC10. What will be interesting is to compare the low-light capabilities: XC10 can do ISO 20000 and RX10 II can do ISO 25600 in extended mode.
A7R II with a 10x Sony 24-240 lens is $4200, about twice the price of XC10, so not really comparable. Sony PXW-X70 is closest in price, but the cheaper RX10 II is closer in form factor.