Interesting on the neck feel. Sometimes numbers don't tell the whole story. I think of you order the thicker neck option it's unreturnable, but I'll double-check with Kiesel on thatI just did a quick setup. Tuned it like a floating Strat or Floyd Rose and its holding tune perfectly. If I bend really high it will put a string out of tune but I just need to tap the bar to put it back tune (like a Strat). Very stable overall, I don't do huge bends anyway and it could be setup to not float as much as this.
You can request a thicker neck I believe. The Vader neck turned out a bit thicker surprisingly, pretty similar to a slim taper Gibson. I do like a bigger neck but no complaints here on the Vader, glad I didn't get the thin option.