While I am a great supporter of your team's work, I'd just like to comment on the above;

Wiser community members are aware that they are part of a powerful ecosystem, and that taming this ecosystem is a far more leveraged pursuit than doing the work yourself. Creating additional endpoints for onboarding processes that you're exposing to new users should be something that all projects are excited to take part in, so hopefully you'd want to poll the community for the valuable "Yes, and..." responses you'll get.

If you find you don't get responses like this, perhaps you might want to consider re-framing your new functionality as open infrastructure that the rest of the community is invited to build on, for example maybe wikiprojects themselves could specify the suggestions that are shown to new editors who edit in their subject areas?

Given appropriate tools to track effectiveness, this could create a huge, open environment for experimentation that could find interesting solutions faster than any engineering department ever could on their own.

Conference Director Wikimania London