I haven't really noticed mine.
Before I actually used the touch bar version I also thought that it wouldn't be easy to use, but as I said, I haven't noticed a difference.
Of course you don't. You use ctrl+[ or rebind caps lock to esc, and you don't use F-keys with vim. But outside of vim you might use the F-keys or Mac keys. I know I do. Cause I'm too shit with multitouch.
I'm a fan of remapping F keys to the numrow as well. But my desktop keyboard is a 60% without F keys anyways. Less for the fingers to move when you use an fn row :)