I don't see the point of the temp acclim.
Things are somewhat different when you start getting online or shipped fish ,es pecially if they're late. As the fish are in the bag they are extruding wastes, and in general these reduce the pH. This is quite good as ammonia is quite a bit less toxic in acid water. But when you start dripping water in the pH goes up again, and while you think you're 'doing good' by slowly raising the pH, in fact you'll kill them by toxifying the ammonia.
So if you're expecting online fish accept they might be late. See what the vendor recommends you do, but I am also going to recommend you use some ammolock