These are not useful right now. One day when the Smart Home Skill APIs improve to handle concepts other than very basic lights, then certainly we will consider having both a Skill and a Smart Home Skill. For now, the Smart Home skills are a very small subset of real Skills with no functionality other than turn on a light or set a thermostat. As an example of many limitations, you can’t even get the thermostat value. This is very early days for the Smart Home API and we look forward to its future enhancements. Meanwhile, our real Skill provides access to large amounts of functionality.
A quicker “fix”, rather than the likely years it will require Amazon to enhance the Smart Home API to the point we would need for it to be a suitable replacement for their main Skills API, is to allow the Alexa user to designate a “default skill”, effectively moving all of the verbs from a particular skill into pole position so you could drop “tell Simple Control” from commands.
Combined with the need for the Skills API to identify the specific Alexa device from which a command originated (to allow automatic determination of the room), those two minor enhancements could be implemented far more quickly than long term architectural enhancements to the Smart Home API which would be very complex to support our 30 different device categories, activities, and many other things we would need that are not conceived of in the Smart Home API, but are largely already available in our current Skill.