It's great to give feedback but I think in some of these cases you have either got unlucky or something is simply not to your taste.
The Imagery, yes it varies but I don't think it's any different from many other manufacturers works. Multiple artists, all trying to nail down the look and feel of the world will use different styles to see what works. I love the artwork and think the different styles is great. I think of the old GW books with very different styles all through it.
The Fluff, I can see why it bothered you but I personally think it is a great idea to break up the rules with the fluff. As I was doing my first read through it was nice to alternate a rules section with the evolving story. to each their own I guess.
The Mould lines, think you just got unlucky. I have had very few issues with mould lines/flash and many of my regular games group have found the same. Some have required more removal than others but that happens. I have found other manufacturers to be far worse.
The Errata, you can't fault them for being comprehensive. I think some games keep the erratas/FAQ small to avoid looking like the system has too many flaws. This leads to the problem of leaving many issues unresolved/unanswered. Also, this is the first edition of a brand new game there were bound to be issues that needed to be clarified.
I don't mean to nit-pick your nit-pick and your criticisms are valid. I would just disagree as my experience has been markedly different.