That's the whole point of this keyboard though, the only thing it's missing is the physical keys. You want F-keys? Add it in as a modifier on the number-row. You do a lot of spreadsheeting? Make a layer with a numpad and maybe some macros and wasd->arrowkeys on the left to make life easy.

Its purpose is to give everyone what they need, but without needing them to have a bajillion different physical interfaces on their desk/s. You want F-keys, someone else wants a numpad, another wants Logitech's G-keys, et cetera, et cetera, et cetera. The UHK says enough. You can do it all on one set of buttons. It may not be your style, but saying it's lacking F-keys is disingenuous.