Hi Hmpws,
We are working on making bulkMutation support better across a bunch of mutations. Currently we are looking at making it work with the productVariantsBulk* mutations. We also are considering adding additional features to productSet so that it could be a fit usable in this situation.
With respect to the daily variant creation limit, we are currently doing a holistic evaluation of our general constraints and resource limits. This is one of the areas that we’re actively evaluating and will post an update on changes here in the next couple of months.