I would totally love the stat to be WAUS. Let's make that happen...
Also, can we understand that just because the stat has the word "WINS" in it, it does not necessarily reflect on the exact number of team wins? It's a stat, just like say... OPS or OBA are stats. The point of the stat is that someone with a lower WAR is a worse player, just like someone with a lower OPS is a worse player, though WAR attempts to combine all (relevant) stats to give an overall value of contribution, rather than just looking at offence or defence or pitching.
The argument that "the team won while Sanchez was pitching, therefore WAR is wrong" is just as silly as saying a guy with a .100 AVG was a great player, because every hit he got all season drove in the winning run. You look at the stat (.100 AVG, in this case) and go "yeah, overall that's a s***** player despite the incidental contributions he has made in a few places..."
The fact that WAR looks at the complete package of a player is the only reason Goins is "pretty bad and probably shouldn't have a roster spot" rather than "HOLY GOD, HOW IS THIS MAN NOT FLIPPING BURGERS FOR A LIVING", which is what you would get if you just looked at his offensive stats.