(I was waiting for this message)
I'm not sure which fleet carriers will give an advantage (I think time will tell)
But now, only for real money you can get an advantage in PVP combat. Try to beat me without engineers (dlс horizons)?
But just OWNING Horizon DLC does NOT give you any advantage... you still have to unlock engineers, and then you have to collect materials to upgrade your modules... ie, you have todo ALOT of gameplay stuff to get to have an engineered ship... There is no shortcuts bypass game content.
This argument about PvP is equally ridiculous as, try to beat me in PvP without ownning Elite Dangerous game...
Now, lets compare to your suggestion...
Pay real money, get Arx
Use Arx to get ingame currency, ie credits
Use credits to buy stuff without having to spend any time in game earning credits...
So if we assume FC would not require any ingame ranks, etc, just being able to buy if you have the credits. Any "new" player on a new account, could pour in real money to buy Arx, then use the Arx to get to over 5 billion, and buy a Fleet Carrier, without having todo basically any gameplay.
If you are going to bring up wing-missions here, then to take advatange of that do require the recieving player to actually do some gameplay stuff, first, they do NEED to get to the station where they can turn in the missions. So they have to fly somehwere, and giving away 5 billion or so, will require ALOT of wing mission, and here atleast ANOTHER player does the work... Same with transfering high valued cargo, it is an active activity that requires all involved parties to engage in the activity.
And if you have so much money burning in your pocket, why not simply hire someone to play the game for you? The result would be the same. you pay real money, and then get stuff in game, and now you have someone else do all the stuff you do not want todo....