I think the way and whether or not you can restock is going to be more important than the max carrying amount. So, let's shift our attention to that.
Do you think there should still be caches? If so, should it change? Would altering it a bit be the best idea?
Should there be scavenging? If so, how should it be worked? Is it a default amount given to each weapon (based on power/ firerate)? Should it be like a kit trade-off (like in Battlefield)? If trading, will you get whatever the kit has or the default amount? Should you be able to reload your current weapons if the body has the weapon you carry?
Or, should it be like CoD, like everyone and everything seems to be conforming to?