i cant understand the need to transition other than appeasing those who dont like hitting less than 90-95%. if you want to shoot OT, shoot it. Get used to it as it is shot and learn to get good. if you want to hit DTL scores either get to be world class at OT or stay shooting DTL. simples.
Yes its depressing hitting 53 at OT. but thats the point, its a challenge!
ABT... well its my favourite discipline because you have no idea whats coming, its as fast as OT with its own complications/challenges. there are cheat ways of shooting it but they are not consistent.
darwinism... get good in your chosen environment. anything else is always a compromise.