The only problem is that when you bring statistics into the mix for anything, this is going to skew the way that players will play the game. There will always be those people that go out of the way to boost a statistic. For instance, if something kept track of hull rebuilds, you could see players letting the hull go down just so they can rebuild it. We all know what can happen if the hull goes down! This would screw up gameplay. People going out of their way to chem spray things ineffectively, buffing stuff unnecessarily, leaving stations to rebuild other parts. It would be like the achievement system in game right now, but amplified.
I have no problem with being able to acquire festive tools, like a spyglass with Christmas lights, or replacing a pipe wrench with a Menorah, but keeping track of stats will always screw things up somehow.