Eh. Kills are a poor indicator of anything worthwhile, and I'm much more impressed by a player's rank in terms of time played than whether they prefer to run support/disablers or killer ships.
Granted, a player's rank is gameable, but in general, I've found it a very good indicator of time played.
I admit, I don't trust the kill count on weapons in other games because of this.
By the way it's not necessarily kill counts that can be recorded. TF2 has "strange parts" that record different things such as enemies killed in specific ways ("airshots" or shooting them when they are in the air, "extinguished allies" when you put them out if they're on fire) and some items are special such as the medigun, so instead of recorded kills, it has recorded ubers (activations).
If we applied this to GoI, we could record
- number of enemies spotted with the spyglass
- number of parts repaired
- number of parts rebuilt
- number of parts extinguised
- etc
Similar to the current system, but it would be item-specific and public. Hopefully accessible in-game when you're looking at someone or when you press a specific key when looking at them (Source games have an "inspect" key that shows you what they're using).
Edit: So it's basically like the TF2/Dota item system without the trading system.