I'm using something similar at the moment, and it mostly works. There are issues now and again though - if the developers of a service own the "top" layers, and start adding new services then that often requires changes to the core.

For example if a team were to suddenly start using DynamoDB then the IAM roles for their application, in their account, suddenly need the permission to add/get records.

Most of the time the layers are distinct and the "ops" team can handle the core, leaving the application/service-specific stuff to the developers, but things do come up that have to be scheduled and coordinated across the layers/owners. It's a pain, but so far tolerable one.