The leader of the churches He criticized was not Christ. Had He been, then the severity of the warnings He gave wouldn't have been necessary. While not good in any event, it's one thing to sin temporal earthly sin but quite another to commit spiritual sin.
Regarding the lampstand, I never said that He did (or does) immediately pull it, did I? My point was that He gave warning
to the true Christians within those congregation He criticized, that if left on their current spiritual path, which path was in not having Christ as Saviour as (their) foundation, that He would pull it. In effect, and as an example to us, this is what He did to OT/NT Israel and the Jewish religion after giving them repeated warnings.
[Mat 23:37-38 KJV]
37 O Jerusalem, Jerusalem, [thou] that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under [her] wings, and ye would not!
38 Behold, your house is left unto you desolate.
I dunno, is your ultimate point that, in and of itself, Christ's offering was insufficient to remit all sin - past, present, future -
for those whom He has saved, or am I missing something? If someone is saved, they were made so, and remain so, by what Christ alone did, not by what they may do or not do. That being the case, Christ's spotless garment is given to them, and by Him, it cannot be soiled nor taken away. If it could, then they either they weren't saved to begin with, or Christ isn't the Saviour. But Christ is Saviour, man is not. It, being a completely free gift from Him to them solely through Jesus Christ and God's exceedingly great mercy, grace and kindness, man therefore is only a recipient of salvation.
I'm kinda slow so why do you say again what your bottom-line point is, rather than of me trying to reverse engineer into it point by point - which I probably won't be able to correctly do? The points you make above must have a common single unifying theory behind them from/by which they come. If you have already done so, and as I've said, I'm kinda slow, so sorry, I must have missed it.