Over-structuring usually comes from trying to demonstrate sophistication rather than solve the problem. Start with the minimum set of branches needed to answer the objective.

Ask whether each bucket could change the recommendation. If not, remove or combine it. Depth can be added later when the interviewer provides more information.

A simple structure that drives the case is stronger than a complicated structure that you never use. If useful, this guide on case structure vs. case framework gives more detail.

over-structuring is such a casing disease lol.

If bucket doesn't change the answer, I cut it.

2 strong branches > 5 decorative ones imo.

I ask myself 'would I actually analyze this?' before saying it.

sub-buckets can come later. opening doesn't need every detail.