I have only a fleeting familiarity with Hanami and Trailblazer. It struck me that they are both achieving very similar ends. I preferred Hanami in that it retained very discoverable mechanics for people comfortable with recent low-level trends in webdev (e.g., Interactors are simply Service Objects) while Trailblazer seems to have its own heavily engineered high-level paradigms (e.g., Cells) that seemed more suited to the Rails way of thinking (geminize all the things!). Any paradigms/approaches that Trailblazer advocates that you prefer over Hanami?