[Preface: my apologies if this counts as necroposting, but the author of the handbook has restarted work on the book and I wanted to give some input.]

I would like to suggest an addendum to "Create Materials", like with Classic Substances. Considering Fabricate also exists, there is no rule against using Creation to create armor, weapons, etc in a permanent fashion. It merely becomes a tax to have a different talent and some extra time. My suggestion is to either allow craft-check creation at a certain Cl or to allow it if you also have Fabricate. At least to me, it doesn't make sense to have the restriction there as a talent tax, especially when there are other taxes already.