“I took exception to that and stated it was because the sum totality of what he wished to suggest is indeed Kefira.”
So you are agreeing that there is no problem with R’ Slifkin’s shitta, but one side result of his shitta is kefirah. That is progress. But your explanation of why it’s kefira is that it doesn’t follow R’ Dessler’s view. How does that make it kefira? Especially keeping in mind that the Dor Revii said it and the Pachad Yitzchak suggested taking it even a step further.