I think it would be neat if their was an option to introduce a second upper house some of the options would be,
1. their will be an upper house and the seats are divided evenly among the states.
2. their will be an upper house and the seats will be did-vied based on population
3. their is no upper house.
If an upper house is added their would need to be an option for the setting of seats I think it should be between 50-100.