There is no tender "Little flock" in the text at issue, and again, the one who knew his lord's will, but "prepared not himself, neither did according to his will" does not describe a believer, nor does a culpable sinner who is ignorant of God's word. The subjects in these cases are those who are set in contrast to the blessed faithful and wise steward, and who instead have their portion with the lost, and will sufferer punishment according to their degree of guilt. Having placed the unfaithful steward in Hell (location), what follows deals with the degree of punishment for unfaithful stewards (sentencing), based on the principle accountability.
You simply have no basis for asserting that "neither of the latter two classes of servant behavior result in assignment to portion of the unbelievers," and that instead they are believers who will have their portion with the redeemed, which is simply not in the text, and you can only wish it was. What is in the text as regards location is unfaithful stewards being with the lost, and of differing degrees of punishment for such. The varying degrees of punishment easily flows from the basic judgment of the first, detailing the basis for the degree of punishment.
Moreover, it is simply incongruous that the Lord would specify where unfaithful stewards end up, but not likewise specify that in contrast, the latter two stewards in Lk. 12:45-48 will suffer some place other than Hell for some time and then be with the Lord. Instead, the Lord speaks of Heaven and Hell-fire, with different degrees of punishment for those who collect the wages of their sins.
Yes, there is. He used it to address his disciples for the parable which led the Apostle Peter to ask the critical question whose answer we are discussing. I find it an apt and endearing address.
He means it is kinduv near the text under discussion. In the same sorta general area. Close to. But not in.
Read the text again. He commanded to sell all that ye have, and give alms, as well warning to always be ready for His return at any hour. There is nothing in the text about believers, but rather about servants, who either obey the LORD, or do not obey the LORD, in various degrees.
Then Peter said unto him, Lord, speakest thou this parable unto us, or even to all? And the Lord said, Who then is that faithful and wise steward, whom his lord shall make ruler over his household, to give them their portion of meat in due season? Blessed is that servant, whom his lord when he cometh shall find so doing. Of a truth I say unto you, that he will make him ruler over all that he hath. But and if that servant say in his heart, My lord delayeth his coming; and shall begin to beat the menservants and maidens, and to eat and drink, and to be drunken; The lord of that servant will come in a day when he looketh not for him, and at an hour when he is not aware, and will cut him in sunder, and will appoint him his portion with the unbelievers. And that servant, which knew his lord's will, and prepared not himself, neither did according to his will, shall be beaten with many stripes. But he that knew not, and did commit things worthy of stripes, shall be beaten with few stripes. For unto whomsoever much is given, of him shall be much required: and to whom men have committed much, of him they will ask the more.