I don't think that's the same Coach Miller.
It is my understanding that Coach Emerson left of his own volition to go to Cushing. He lives closer to Cushing and that may have been a factor. Plus, I would imagine that the salary, benefits and opportunity to move up the career ladder are stronger at a UIL 2A 11 man program than at a TAPPS Div III/ 2A 6 man program. That's just my take. From what I've read about Cushing, it looks like it will be an uphill climb but Coach Emerson is a good coach and I hope he does well up there.
Judging by what I see and read, there is lots of movement on the coaching carousel over the summer and especially at private schools.
Coach Miller has been an assistant to Coach Emerson for at least 3 years at Trinity. I believe he came with him from King's Academy.
Just speculating here because I can't speak for the administration, but I would imagine Coach Miller's hiring was just a logical transition from one coach to another who is experienced and familiar with all aspects of the program. Coach Emerson left one day and Coach Miller was hired either the same day or the next day. I know that the kids were bummed that Coach Emerson left but they are equally excited about playing for Coach Miller. There will be no drop off and I think Trinity will be up to the task to get back to Zephyr.