So let me get this straight:
They added this NEX thing that you buy PLEX and exchange them for new currency to buy vanity items.
The concern is that you will be able to buy PLEX and exchange them for new currency to buy in game items (ships etc.)?
Isn't that pretty much exactly what you can already do by buying PLEX with real money and selling it for isk and then buying in game items? Which is legal. If they don't add SP purchase or faction standings, then it seems like EVE players are getting worked up about something that has existed for years.
Someone posted a diagram somewhere but I can't seem to find it. Basically if you buy a PLEX with real money and then trade it for ISK, you simply re-distribute ISK already in the game from people who either have lots of time and/or good in-game income streams to people who don't have the time and/or good in-game income streams. No magical ISK was created or added to the existing market. The people who then traded the plex for ISK then use that ISK to buy other ingame items, which are very likely player made. Thus, distributing that ISK back to the player-base/economy.
So say he used the ISK to buy a tengu. That transaction then paid the guys who mined the ore, the guys who transported the ore, the guys who protected the miners and transporters of the ore, the guys who refined the ore, the guys who mined the gasses, the guys who transported the gasses, the guys who protected the guys mining and transporting the gasses, the guys who owned the POS which ran the reactions to convert the gasses into regents, the guys who ran explorations sites to get the blueprints, the guys who researched the blueprints, the guys who ran the lab with researched the blueprints, the guys who guys who used the ore, regents, and blueprints to manufacture the hull, the guys who used the ore, regents, and blueprints to manufacture the subsystems, the guys who ran the manufacturing slots which performed the manufacturing runs, the guys who hauled either the regents out of the wormhole space (or the completed hulls/subsystems), the guys who protected the guys haulling the regents/hulls/subsystems out of wormhole space, and finally the guys who put the the items up on the market. That is what the ISK paid/affected when he buys that tengu (just the hull and subsystems).
Now say you can buy GTC, convert to PLEX, convert to AUR and buy a tengu with AUR. Guess what happens, CCP changes a number in a database/file and you have a tengu.
ISK that would have moved from someone with high in-game income, would not have transferred first to the guy who bought the GTC and then from him to all the people/services involved in building the tengu. And now you are adding more ISK into the game, since instead of simply re-distributing it, you are printing more ISK into the economy (as the tengu could be sold by the player) which anyone who studies economics knows it is never good to just print more money when dealing with a fiat currency, you simply cause inflation.
So the big deal is that with buying PLEX, sell for ISK, buy items, no economic inflation occurs and you "employ" lots of other players. If you buy PLEX -> AUR -> Items you cause inflation due to printing more ISK, and destroy the player market for the goods since the AUR price is set by CCP and not following the ISK market prices for the same Item, but since there is a direct conversion rate via PLEX to ISK relationship, the markets will adjust prices on the items (since they cannot have two different prices for the same item), and this will cause even more turmoil, either further inflating costs on the item (if CCP prices it high), or drive the in-game manufacturing of the item to cease because they can not compete with CCP's price if they price it low.
THAT is what the BIG DEAL is.