Maybe a bit late but I find the 24-70 to be almost a different lens on the A7s where for me it performs excellently at all focal lengths and even wide open. Most of it's testing and reviews were done on the A7 & A7r and I can only presume that the lower pxel count doesn't show up it's weaknesses.
Anyway congrats on the purchase it is indeed an amazing camera and I feel the FE35 is an underrated lens.
Anyway congrats on the purchase it is indeed an amazing camera and I feel the FE35 is an underrated lens.