I agree with the other posters saying the realism should not be compromised. This system has advantages beyond simply making the game more realistic. It helps mitigate griefing because you aren't likely to get much off a guy who's just gathering resources. It also keeps people moving more often since they will be forced to carry materials more frequently. Being able to simply sit in a spot gathering a ton of resources would have a negative affect on the game's economy as well as making resource botting even easier.