I think we are trying to make the solution too complicated and we just need to come up with some rules and penalties that has the clubs modifying the way players tackle and bump more than finding clever ways to punish the offending player on match day.
Minimising the number of incidents from occurring is more important than defining the punishment.
If a player is found guilty perhaps an automatic 3 week suspension as a minimum is sufficient.
Clubs wont be happy losing players for multiple weeks and will work on technique and attitudes towards bumps etc to ensure it won't happen.
For some reason I cant warm to red cards but perhaps I haven't got the point of it.