Mac keyboards put fn in the bottom left. Personally (disclaimer: Mac user) the third point is the least important, and if this is a problem for you, you should remap the physical command and control keys, which is fairly trivial to do on macOS.
Heh, you're not going to like this, but I do remap the keys, just not that way. I have fn -> Cmd, Ctrl -> fn, Alt -> Ctrl, Cmd -> Alt. This requires Karabiner, AFAIK.
This sort of imitates what I consider a sane setup in most applications. That is, "copy" is bottom-left button plus c, just like it is in every other operating system.
For me, #3 is actually very important. As I mentioned above, I have a lot of trouble blindly finding the (physical) Cmd key on the MacBook keyboard. Whereas the fn key is trivial to find, it's just the bottom left.
