The subscription of Eve Online is for keeping their proprietary servers running, as well as paying their staff to work on the game. Most multiplayer is community driven, as is DCS, so I think gamers would have a tough time comprehending why the game would be a subscription. If ED showed a strong development cycle, there would be an argument for subscription.
Personally I would like the idea, to expect frequent updates and bug fixes, for a marginal subscription fee.
And yes, "throwing money at the problem" does not make good games, absolutely. IF THIS WERE TRUE WE WOULD ALL BE SHITTING FRANKLINS INTO SOME HOLE IN THE GROUND