Hi, @otivax , Great Job!
Have you ever think about implement your driver with a parent/child relationship, this way you can have a parent device representing the IR blaster itself and through that you can create virtual child devices (of diverse types for TV, AC, Fan, etc) for every remote controller that you are learning/copying codes.
Something similar as how the Tasmota Edge Driver does: you add the IR Bridge and from IR Bridge device you can add a virtual Air Conditioner, for example.
[ST Edge] •• Tasmota Edge •• for Sonoff, Tuya & many other ESP WiFi & HTTP devices - over 2000 Tasmota supported devices - Devices & Integrations / Community Created Device Types - SmartThings Community
This way i think you can simplify automations as you can directly select the virtual devices in the routines.