Wow. Well, the only intelligent view-point is to reserve all judgment until one actually hears this latest effort. I'm at least five recordings behind on this whole topic, so I need to get caught up.
My problem with his whole B9 business - up until the Teldec recording or so - is that, to me, what there is of the finale sounds more like the start of a 10th symphony, than a finale to the 9th symphony. If only 100 bars of the finale to Mahler's 10th existed, I don't think that anybody would say to themselves, "that doesn't belong to the rest of the symphony". If anything, I think that the general public's interest would be all the more peaked. But what there is of a B9 finale, makes me think that Bruckner suddenly jumped from planet Earth to Jupiter, or Saturn. Further more, keep in mind that the law firm of Samale, Phillips, Cohrs, & Mazzuca have had to compose the coda and final perorations entirely on their own (and I'm not trying to be snarky - I'm trying to be a bit humorous). If anything should have convinced me of the possibility of coming up with a truly satisfying finale, it should have been the Harnoncourt lecture/demo from his VPO recording. While I found Harnoncourt's lecture/demo to be quite interesting, neither was I convinced that the the 9th symphony HAD to be finished. I didn't feel any great sense of urgency - much less need - in getting Bruckner's 9th finished. But as I said above, I'll reserve any final judgment until I actually hear this latest attempt. Just keep in mind that while much of the "grunt work" may be thoroughly convincing, the entire coda was not in the slightest bit penned by Bruckner.