Those are fully upgraded scores? I like the system, it works and it's pretty simple, though it leaves out stats that [i]aren't[/i] fully upgraded. It's no problem, just making a point, I'd rather have this guideline opposed to something we had to strictly follow, or just nothing at all. 

For weaponry that's not fully upgraded, I can assume we'll find an accurate balance. Nothing's going to be super powerful right now, but say my damage for the Javelin Cutter was 6 / 10, it would be obviously better than something 1 / 10, but couldn't [i]penetrate deep[/i] (oh yes).

I say we stick with this, and if we find any troubles with our next upgrades, we can fall back on this method and apply is accordingly when coming up with something to fill the gaps.