It's to Sony's credit that their acumen is so good they went it alone and achieved the perfect functionality/bulk/weight compromise in the a7 series.
Keep drinking that Kool-aid, chap
Way too much koolaid
The A7 series is another demographic from APS-C. It was saved from failure initially only because of it's mighty sensor and being first to market - not at all because of Sony's design decisions.
The design decisions that went into the II's are not about compromise honestly - they are about demographics alone. The size and features in the body are telling. They are not compact or consumer grade, they are not even attempting to disguise themselves as one.
The design decisions that went into the I's are not about compromise either - they are about a prototype product to test that demographic, to put a toe in the water. They are first to market, so they are forgiven.
Each of the A7 I's are technically worse than a lowly A5100 - worse at everything but their sensors, which can fit in an A5100 body, ironically. The A7II is technical inferior in a variety of ways as well. The A7RII appears to be better - we will see.
The market for FF cameras must be sufficiently massive to risk APS-C sensors and benefits. That, or they must have applied the A6000 and A5100 technologies and design philosophies to a higher pixel density replacement, and we don't know about it yet.