Out of curiosity, what do you use function keys for?
I'm a developer, and the only key I routinely use from the top row is escape, for vim. (And Ctrl-Alt-F1 to drop out of X11 on a Unix system... but that's not applicable here.)
Anyway, it looks like you can still put a virtual escape key on the touchpad when Terminal is active. Or if you want a physical key, you can also remap one of the other modifier keys to act as escape.
I'm a developer, and the only key I routinely use from the top row is escape, for vim. (And Ctrl-Alt-F1 to drop out of X11 on a Unix system... but that's not applicable here.)
Anyway, it looks like you can still put a virtual escape key on the touchpad when Terminal is active. Or if you want a physical key, you can also remap one of the other modifier keys to act as escape.