Unless I'm misunderstanding your suggestion then no, it doesn't work. There is a redundant sequence because IF SYS PWR is false then it adds a 3 second delay to allow time for the receiver to power on before switching the input. ELSE, the same sequence is sent without the 3 second delay. I see no way around that.

It doesn't get to that point though, for at least 12 seconds. If I switch to another source and back again it takes 12 seconds for the input changes to be made. That is what does not make sense. There is nothing in the macro that should take that long to execute.