First up, not a fan of calling MCTB 4th path arahat but meh!
Secondly, I can't get passed the fact , from my own experience, that a sense of "being" persists via the arising of any affective feeling, subtle or gross, pleasant, unpleasant or neutral. And this sense of "being" seems to allow for all sorts of mischief to bite me on the bum...craving, aversion etc. Of course , I can choose to watch the sensations that make up the compounded affective feelings do their thing, but a subtle sense of affect always remains and thus a sense of "being" persists.
I'm convinced that the sense of "being" (affective feelings) has to go for there to be complete peace. The sense of "being" is the sense of presence that, although easily seen to be transient impersonal phenomena, still arises to influence the occasional samsaric nipple burn. Although all nipple burns are sticky-free post MCTB-4th path. There is just no stacking of suffering.
Certain compounding is still occurring, yet no self can be seen in any of it. But suffering in suffering (even without a self anywhere to be seen) is still suffering. PCE practice showed and continues to show what I equate to be the cause of it all. An attachment to being (via the arising of affective feelings). Affective feelings seem to be compounded in order for a sense of "being" to arise, in order for there to be a continuous flow of becoming, becoming, becoming.
The only way I see how we all suffer, is via the arising of affective feelings. Craving, averision and all feelings related to either one, are all affective. Without the sense of "being" (affective feelings) there is absolutely no suffering, stacking or no stacking--> The freedom from suffering I've always been seeking. I don't care what it's called or if it's considered buddhist or not.
PCE/AF practice is proving to be very, very, very progressive for me. When I was doing this practice,
http://thehamiltonproject.blogspot.com/2011/01/yogi-tool-box-letting-go-approach-to.html I "felt" like I was progressing too (A lot of NS was blissing me out) But still, a sense of "being" persists in all the jhanas. I wasn't seeing this being dealt with.
So, I returned to PCE practice and all interest in jhanas and nanas (they don't arise in PCEs) went out the window. The sense of being is losing hold, and getting closer and closer to walking into oblivion willingly. After all, it's a useless illusion now. It doesn't need to be there in any transient, impersonal form. Life has improved tenfold and I'm in it for the life improvement , not the jhanas/nanas spiritual trip nor to feel like I "belong" to a group nor feel like saving the world. I'm in it to be happy and harmless for my loved ones and those around me.
This is something probably best answered by yourself when you get to MCTB 4th. You can then see for yourself what all the fuss is about. And the fetter model arahat proven track record? Do you know anyone who professes to getting to the fetter model arahat stage? I think Kenneth Folk may have sort of claimed this a while ago, but Im not sure. If a sense of "being" persists, even though all affect is pleasant and nice, a fire can always get sparked where there are glowing hot coals sitting there waiting for a gust of wind (affective feelings) IMO. The sense of "being" has to go for there to be freedom from suffering. This is my current opinion due to PCE practice.
:-)
Nick