Thank you for reading ... and as I had stated earlier, I often edit my papers, to make them less strenuous reading, and other times, I add what I might have inadvertently missed.
Accordingly, I have added, the role of Ahle Bait e Rasool and their pivotal Sacrifices, for Islam.
Regarding, the first question ... "Since war, is not my subject, I am not aware, if slavery is still in vogue, in the classical sense.
What I am aware of, is the fact, that while gold and land are for the King in victory ... women, wine and looting is considered the right of the winning sides foot soldiers ... since times immemorial.
Regarding the second question ... The person you refer to, is already following a [Wrong]Course ... And in such, there is no provision for the Middle course ...
Unless... the person takes a U-Turn, and changes radically, there little likelihood, that such a person will ever be able to adopt the Middle [Right] Course.
Regarding your third question ... A "Muttaqi" achieves all that hath been Ordained of the Good ... in this life, and the hereafter.