The most recent radiographs (April 2020) are in Majestic's photo album:
The most recent rads do show improvement in the trim over what was present in May 2018, except in the sole depth, which is definitely worse now. Latest rads show thin soles, longer-than-ideal toes, some sinking and a somewhat broken back HPA - RF worse than LF. These things would all be contributing to the worsening ringbone. Shoes won't help any of those things, but they may temporarily hide some of the lameness that is present. Until they don't.
Need to optimize the trim in order to actually address the causes of the worsening ringbone.