These types of calls essentially require a blatant error in timing made by the putter to be seen in real time.
I see way more 'falling putts' inside 10m than I see stance violations on a jump putts outside 10m. Plenty of folks (mostly Ams) out there fail to establish balance before proceeding forward. They just putt and keep on walking toward the basket w/o stopping.
Having never seen this particular hole, I like the fountain grass idea as it can 'paint' the Winter landscape...then be cut way down in the Spring. Any variety of these takes a few years after the initial planting to really get going...and they need a LOT of sun exposure to grow to their tallest. So, unless this is the South side of this tree, it will provide semi-marginal coverage at best.