There is a Rose Propagation Forum. It gets more diverse traffic than this forum.

I read about yucca, willow bark, honey, etc ... what other natural things have people had success with?

I root hundreds of cuttings a year and I use a mix that has Canadian peat and perlite. The perlite turns green all the time and does not cause a problem. Live cuttings after 2.5 weeks is a great sign, they should be callused over by now, or maybe have roots already. I would not repot, I don't think that the potting medium is that important.

What rooting method do you use specifically? I assume you have good success and would love to get information.

I tend to use same potting mix as for established plants, and when it greens up on top, it's a sign that of algae, I think, where the medium is too moist. I could see how a more porous medium would limit the overwater/moisture aspect.

I have a mist house with an intermittent timer. The water goes on ever 8 minutes for 15 seconds. Things get pretty wet in there. One important factor for controlling moisture is the depth of the container. The more depth of soil the better it will drain. Has to do with pressure head. Vermiculite should have good pore space.