This may have already been posted as an idea, but there needs to be more realism, the threat of relegation is a very real thing in real football, so why not here, I suggest, the bottom two clubs are relegated automatically and the bottom 3rd and fourth bottom teams have a one off playoff to see who also gets relegated.
As with promotion, relegation brings with it a change in star ratings for your players, when your promoted they currently go down, not sure I agree with this but I understand the mechanic, so when your relegated the opposite happens, star rating goes up, the relegation and star increase will give the owners of these relegated teams a chance to put things right, they actually maybe owners that don't really play anymore, so just let things happen, this may intice them to return to the game, therefore improving the player base.