I disagree with mining field depletion for some reasons:
1. Recently, some players left the server due a bit hard to make money as miners (around 8 players in only 2 weeks!) So... i suspecting this number would rise (already happened in the past)
2. Helium BAR will suffer this a lot hehehehe, but not only the Helium BAR in pennsylvania. Pennsylvania is the first system for starting, and usually plenty of newbies trying to earn their first bucks. Imagine if the field start to be depleted just for 3 or 4 miners working there... the newbies incoming will have no way for earning money.
Instead changing this (i think unuseful), why not change a simple KEY for dropping all cargo?. Simple than changing SUICIDE KEY (nobody use that...) for this feature. This will help A LOT to all miners. Long time ago someone told me "it would be added in the future..." (2 years ago now) "... its a simple FLhook change, but not urgent right now"... Miners we still waiting hehe.