Russia’s length as a nation would create discomfort for the spectators in World Cup as they would have to cover a little too much distance at times to watch games.
Not only the spectators, the players too would be on the journey a lot more which would be highly exhausting.
The area of Russia is bigger than any other nation. A portion of it falls in Asia, while, rest falls in Europe and the games have been deliberately slotted in the latter portion as the spectators would generally be from Europe only. However, even that European portion is a little too big.