With the benefit of hindsight, I think you can conclude that the system was over-engineered. If you’re trying to answer only “was it over-engineered?” I think you can answer it with hindsight.
If you’re trying to answer “did the people who built it exhibit poor judgment resulting in the system being over-engineered?” then you need to know more than just the after-the-fact outcome.
If you’re trying to answer “did the people who built it exhibit poor judgment resulting in the system being over-engineered?” then you need to know more than just the after-the-fact outcome.