And at some point you would get to the lowest division and maintain your place. Big Ant aren't going to just throw up a Game Over screen if you get out too often.
In this edition, that lowest division is the state/county teams - it would be great in future if they added more levels to the career - but you'd still have a low point that you couldn't go below.
Once you make it to a higher level, you can fall back down if your performances are bad, but you can't fall lower than the bottom.
You could even use the existing editing options in the game to pretend there's another level - create 6 local teams and replace the Australian domestic teams with them, and then try to make your way from 'local' cricket to the county tournament.
Obviously the batting order would be one way - but what if you started to bat really well lower down the order - would being promoted back up the order be the right reward for doing well? There would need to be more to it than simply dropping a batsman down the order if they fail and moving them up if they succeed.
For me 'not being considered for national side or other leagues' is a huge consequence for failure - I want to make it to the international stage, seeing the changes in how close I am to that are a huge reward, and seeing them get further away is a big risk.