Yes, I could not agree more. I've been in both the dynamic servers and the dizzying array situations and those are absolutely good reasons to use a wildcard. I worked for a company that white-labelled services so every customer had a vanity subdomain, and managing certs because an utter nightmare until we finally just bought a wildcard.

Recommending encouraging non-wildcard certs is the optimal strategy. Only thing I would add, is recommending default to non-wildcard and evaluate deviations case by case.