And that seems to be the aim of the end-of-episode twist of this recent episode of 'Arrow'...to accelerate the timetable that Ra's Al Ghul mentioned (that the Arrow will be once more alone)
But it makes no sense - that process had already begun (the police returning to a policy of keeping him at arms length) . . . and when you're an immortal, You - Can - Wait.
Unless Ra's Al Ghull doesn't really want Oliver Queen to succeed him...but in fact wants Nyssa Al Ghul to prove herself worthy once more to be his successor.