Not only ammo, but also the change where the number of hits stopped being a random value and weapons were just assigned a number of hits to fire. This unbalanced many weapons significantly. Jesfa and I just brought the stats a bit more in line, under those new circumstances.
Thrown and heavy weapons are not considered implemented (as per April Woods' posted quote, which is the information Zhao gave me about heavy weapons) and will have their stats redone when Zhao decides just how he wishes to code them. Otherwise, individual weapon stats may of course be modified in the future, particularly for any significant canon discrepancies that won't be too detrimental to game balance, but overall the PWs and NPWs should all be functioning within a fairly reasonable set of parameters, compared to the significant imbalance the hit changes created. Basically, it is better than before but not perfect right now, IMO.
It's hard to be more concrete with answers about combat, unfortunately, since the entire function of NPC/creature combat is to create a combat test environment. It's very much a gradual step-by-step process and I think we all hesitate to call anything about it absolutely concrete right now.