The stats are there so that people can get a leaderboard. Something they can be proud of, something that shows they need to step it up. Something to make their performance more visible, something to make the game more fun.
Stats are fine. That strange number that judges
how fine is a problem though. I've gotten a score of .8 for Piloting during a game where we got only one kill and died about 6 times...but it failed to account for the fact that each and every one of those deaths was a several-minutes long chase that kept the capture point in our hands and/or prevented an enemy capture, allowing my team a 650-0 victory. That's not bad piloting: that was a case of knowing that my ship alone couldn't defeat the enemy team, and thus deciding to focus on surviving and trick piloting to hold the point as long as humanly possible.
The thing that MOBAs do is display a stat screen that shows all the information about total contribution. To use League of Legends as an example, it shows the following:
Kills / Deaths / Assists
Total Creep Kills
Total Tower Kills
Total Damage
Total Damage to Champions
Total Damage Taken
Healing Done
Gold Earned
Longest Killing Spree
Inhibitors Destroyed
Monsters Killed
...
...and so on.
What it
doesn't try to do is put a value on this. It doesn't say "Oh...you only got 1 kill and 8 deaths, so you get a 1.2 out of 10." That's because those deaths might have come as a result of single-handedly backdooring the enemy's base while the rest of your team distracted them, resulting in a net gain for your team even though you died every time.
GoI might want to take a leaf out of that book. Don't
give use a score: let us figure out the value for ourselves. Instead, simply display numbers:
Engines/Balloons/Armor/Guns destroyed
Engines/Balloons/Armor/Guns rebuilt
Ships destroyed
Total deaths
Fires lit
Fires extinguished
Points contested
Points defended
Ram kills
Crew kills
...and so on.
Even if you merely display a few...say, a players most impressive three at the end of a game.
Just don't attempt to make a system that judges the quality of their gameplay by the result.