Until the next PvP space game comes out and the PvP crowd move on to the next big thing.
It's not in their interest to alienate their customers in favour of a short term fix.
They're clearly on the path of self-destruction here.
Sure, let FD "focus on multiplayer improvements" to the detriment of the single player experience.
When they're done using that excuse, have managed to completely ignore Solo much as they've done in the past by adding "moar multiplayer!" consistently and still realize that they haven't magically increased the numbers in Open, there won't be much of a player base to come back to apologize to. And new players won't touch it with a ten-foot pole once they know the history of how FD destroyed the game to pander to one playstyle although it was clearly advertised for both.
Those who are dissatisfied currently are all about this path because they "don't play it anyway", "have already left", etc. and could care less whether they burn this game down. As you said, they'll simply move on to the next thing when they're done.