I can see that, but at the same time we're trying to break the world, and the only really worldbreaking ability we have access to is sealing (and diplomacy, but that takes a while and is risky without carrying a big stick to back it up with).
E: we can get Hazou to Stealth 12 if we're willing to take Capacity 8 instead of 9. For Noburi we could do
@Twofold's 8/9 medical progression now and then come back to it later when we've got a little more XP, and spend the rest of that XP on making Noburi a little better rounded out. Keiko can probably be convinced to up stealth at this point given what just happened.