I think that one of the biggest things that could help the US multiplayer community is removing Western Servers in favor for Central Servers. I know TW has explained that it isn't like they can snap their fingers and get a server, however all im suggesting is to keep your eyes out and try to get it to us in the next couple of months to the end of the year.
Also, even though im yet to try out the im concerned about the damage reduction of the throwing spears and pilas. Coming from a missile homing beacon such as myself I don't see the large amount of damage as an issue, and if you want to reduce their effect then I believe the solution NIN3 talked about, the getting rid of other throwables if taking the "heavier" throwing weapons would be the right move.
Finally, because I can't think of anything else to note, I want to say that performance on multiplayer still seems bad, I lag everytime I get into the fight like everyone else, however unlike everyone else I have to deal with 100-110 ping because I live on the otherside of the country. I think the issue has something to do with map optimization but I can't be for sure. Might be worth a look over but yeah.