Let's put aside the science, because they haven't taken the data they wanted yet, so it's impossible to debate, and indeed somewhat beside the point for this 15kg instrument.
The thing about spacecraft is that there is a huge engineering component. The s/c is in a novel environment (vacuum, radiation, cold) and many systems have to work together. You have to figure it all out in advance, using first-principles physics and modeling, and design and build a system that works without further manual intervention. Just getting it there intact is a significant achievement in systems engineering.
Technology demonstration is what this mission was about.
The thing about spacecraft is that there is a huge engineering component. The s/c is in a novel environment (vacuum, radiation, cold) and many systems have to work together. You have to figure it all out in advance, using first-principles physics and modeling, and design and build a system that works without further manual intervention. Just getting it there intact is a significant achievement in systems engineering.
Technology demonstration is what this mission was about.