Just watched your video – I personally am THRILLED that they no longer will be grooming those trails.
Like you mention, exactly how many "rescue missions" have been required in the past?
The skiers need/do to take a good portion of respsonibility on these trails…and with so much technology (GPS, cells, compact down jackets) available and in use by skiers, seems the liklihood of not getting assistance is less and less.
As for trail maintenance issues, again, why not have volunteer ski maintenance crews (maybe for a reduced park pass rate??)…yes, there might be occasion where a chain saw is requred, but 90% of the time a manual saw is fine, which poses limite risk if attached properly to backpacks. Or go in on snowshoes for trail maintenance.
Anyway, I think there are enough overly groomed trails (like #3 burma) that leaving the "classics' like 8 and 17 provides the variety that supports a broad set of skier types.
As for snowshoers…would they like those trails? It's the "thrill of the hill" (on 17 and for skiers…not so sure snowshoers are as drawn to them.