I use this lens a lot.........never have any issues with sharpness. That being said, I've been on the fence about trading up to the new 16-55 II, more so because it's brighter.
If you're in the same price range as the X100VI, I would recommend the XT-5. I'm actually thinking about the XT50 as a second body and something for my wife to learn/carry, but it's not weather sealed like the XT-5. I love mine, can't go wrong.
can never seem to get a good shot of these animals.........they don't move a lot and tend to feed with their eyes closed, lol
little one with the momma