It’s definitely been improving with new versions every few months, but now that the hardware in an iPad Pro is essentially identical to that in a Mac, we’re at the point where there can be feature-for-feature equivalence, even if the user interfaces are a little different. (Though, with trackpad and mouse support on iPads now, the user interfaces can begin to converge, too. Most people using word aren’t going to do so without a keyboard. Maybe there’s room for the existing Office on ipad for light work and editing, using primarily touch, and a more direct port of Mac Word to iPad for use with setups that have a pointing device (trackpad, mouse, or Apple Pencil).