It is a very good write up.

Based in your example, a team of 4 would deliver around 32SP in one sprint. Since the scale is time based, means this is a fixed velocity for the team.

After some time, with the gained knowledge and the improvement of teamwork, team members can deliver value faster. Some user stories would require lesser story points.

The team is delivering more values in one sprint.

In this case, how do you measure the increased team performance since the max time the team can contribute is equivalent with 32SP?