Medal of Honor: Vanguard's problems aren't due primarily to gameplay. While most of the game feels outplayed and overdone, the integration of the Wii-mote controls is what ruins the experience. Once you pop the game into the system, it is fairly obvious that
Vanguard wasn't intended to be a Wii title. Even simple things, like a pointer function for inputting your name, aren't present. There are even a few inconsistencies with button assignments in one or two menus. For instance, when starting a new game the (A) button is "Yes" and (B) is "No"; however, in the very next screen these assignments are flip-flopped. The execution is sloppy.
The general set-up is playable and, with some tweaking in the Options Menu, can be satisfying. At the same time, many players may not have this level of patience and, even with adjustments, the mapping of functions is bad. Many of your moves are either mapped in questionable areas or are overly complicated. Switching between prone and standing positions is handled by either the buttons on the Nunchuck or by moving it up and down. It doesn't take much movement to switch positions so you may find yourself going prone when you don't want to. In short, the functions simply feel like they were grafted on at the last minute with little thought towards functionality.
Medal of Honor: Vanguard isn't a bad FPS, at least compared to what the system currently offers. At the same time, Vanguard is a missed opportunity, since it was EA's chance to give the Wii its defining FPS. While it may be a bit on the generic side, if you can deal with the control scheme and are in the market for another FPS, this is it.