Not so much from a technical/architectural perspective but simply from a project viability perspective. I can't effectively argue the technical de/merits of the decisions to date (although the new approach towards of deriving from a Float if you want "Floatish" behaviour makes more sense to me, and I have never seen an effective rebuttal to Leo's posts regarding the problems with continuations/registers) but I also feel that it is largely irrelevent. As long as there are no feature gaps for target languages and assuming that we meet (at a very minimum) Perl5 performance then I don't give a crap.
I trust there are enough eyes on the project that decisions taken will not prove disastrous. Having the head honcho and the lead developer on the same page is a very good thing