I'd put Phenom in the category of game-breaking because of the mex that can't be built. It's mirror on the other side of the map can be built. Other than that, the asymmetry is not noticeable until you take a careful look at it. So the only things that need to be done is to relocate the mex that can't be built, and align the mex icons to the grid.
As for Therum, maybe some trick in the lighting settings could change it. Other than that, a change in the map textures should do it. With more visible terrain, the map can definitely work (both as 2v2 and 4v4). Depends on if the map author is willing to do this (if they're still around).