Whether WiS is the way to go or not, I expect we'll know within a year. At this point, there's no sense in rocking the boat just yet.

Both, Star Citizen and Elite: Dangerous are promising WiS as core gameplay at some point soon. I'm not sure when Elite plans to start delivering it, but Star Citizen's WiS module is supposed to be hitting beta late Spring or early Summer of this year. And release with the full game late in the year, or most likely this time next year. In short, we'll be able to see how well-received (or poorly-received) WiS will be in at least two other space sims. If people absolutely love it, it'll be a pretty clear sign that it should be revisited. If both those games fail to deliver, and/or it's poorly received, that'll also be a clear signal to avoid it.

Besides, with CCPs development speed, even if they did decide to do it, it would take a couple of years anyway, so might as well sit back and watch what happens with the other guys first.

One bad thing could happen though, if the mechanic is well-received. Namely, people may start to see this module as standard for this type of a game, and expect it. Only to be let down by EVE in this regard. What I mean is, both Elite and Citizen will have character creators. After character creation, you will presumably be dumped into a social module. As in, the character you created gets to walk around, see other characters, /wave at them, dance naked on the mailbox, whatever. And only then do you go and get into your ship and take off, with your identity in the game world as a full-fledged character firmly established. By comparison, EVE will still be in the middle ages. You'll create your character, press Play, and end up either ship-spinning in station, locked in a tiny cubicle alone, or in a ship in space, with no identity established, and no player-to-player interaction as of yet. So new players, who haven't tried EVE yet, but already cut their teeth under Elite and Citizen, may be quite disappointed by that. To the point that they may begin writing the game off as outdated and feature-incomplete.