I got your point i was expecting that it will be more intertwined on molecular level than my knowledge reaches so far but we are here to solve this sh*t right!?
While i see in your above points that it would have impact on different activities but all those have same in common and that is that each of them investing their time into activity in order to gain LP while some of them have already given an advantage to gain more out of the LP’s then the competetive branches, which boils down to one thing that the LP is spread accross way too many activities.
Either, diversification of this currency let say there would be completely new currency for CONCORD-ers/DED-ers in form of CONCORD COINS (CC) while those items which they currently have lucrative access trough their hard work would be purchsable trough CC and LP in different values.
‘‘Divide and rule they say’’
The branches like SECURITY or MINING which are very common and popular way of gaining LP could benefit from the abillity of selling their LPs hassle free to the traders or even creation of corporation where the LP would be transfered dirrectly into the coporation’s chest with immediate ISK reibursment while they could set the value for which they buying this LP of the players inbetween some acceptable borders. I am pretty sure there are many trilionares out there ready to set up such a human farms.
‘‘The sheep would stay whole, while the wolf fed’’
The efficiency drop would be an option but it would definitely discourage the LP trading schemes and thus defeating the purpouse. Still, people would willing to do it, we can see this in SP market where there is less skill points injected which was paid for yet they still buying it.