The upper Cafe level was re-roofed in 2000 and had a new toilet put in, and was then used as administrative offices for a number of years.
The idea of demolishing this building to keep the mountain environment tidy is a bit hard to take when the parking area in front of it is treated as a landfill site.
There is no pressing need for demolishing this building other than making sure it can't be used in the future.
As for tidying up the mountain - have you had a look around the Aonach Poma loading rig or top bullwheel site or the mid-station of the Chairlift where a hut and wooden decking was demolished and the debris left scattered around the site.