Came into the same issues. I hate example projects like these because they are misleading and read like silver bullets.

The split stack resources thing is extremely difficult to manage due to serverless not supporting CF params. so you have to use CF cross stack references which are horrible or hack in support like we did.

I’ve seen issues where you can’t put the value of a variable as an arn in an event due to the poor abstraction across the top of it as they’ve tried to make it cross provider, completely pointless. Just breaks.

Stick with cf/terraform if you’re starting a big project.