for Monument, the light source is obviously coming from the right, which is why there is so much shadow on the right statue and not the left one, as well as the left side of the dome and building. I think it's a pretty dynamic lighting choice for something that could be really boring. I agree that the bases of the statues are drawn so that the view point is off centre with the Monument, and I think the artist should have chosen to place the viewer right in the middle of the Monument, so that the statues are both at the same angles.
However, take into account that the space on a card is really small. Say for tournament, the artist was trying to show a lot in the tournament. By placing the stands far back, we an see them entirely and we quickly get the sense of a tournament. If you were doing this as a large painting, yeah the stands should be moved forward so that we can see all the expressions of the crowd members and see their movements.