Well my personal experience with FPS on the Wii resumes to Prime 3 and Red Steel, but I found the controls on them superb, the Wii is perfect for shooters since your movements are much more fluid than with analog controlers, and it's up to par with the KB+mouse combo for pc's (And I've played most FPS's on PC since Wolf3D).
Also it doesn't need auto-aim for that same reason, so i'm guessing DICE just doesn't have much experience working with the layout of the wii controls, or they just don't want to learn how.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
