I purchased Autumn Wood in 2010. It was in a container and had 3 fans. It has not increased much since then. Branching and bud count are low by today's standards, probably 2-way branching with maybe 8 buds, but that bloom is so gorgeous I don't mind.
Here in my zone 6b garden, AW blooms from about late June to mid-July. I have not noticed rust on it.
This picture, taken on 7/3/15, shows the foliage looking fairly decent and the blooms sit just above the foliage enough to be complimentary to the plant as a whole. It's registered height is 24" and I believe that is what this picture shows too. Lavender Blue Baby is to the right of AW (registered at 28"). Outrageous is directly behind AW (registered at 22" but it gets much taller).