My response to the title of this thread: Yes please. The sooner the better!
Some of what he says on speed skating makes sense. It seems wrong to have the same distances competed over in both short and long track. I don't think the speed skating world is big enough to justify this.
A 250 metre track makes sense as a relatively low cost compromise.
The ISU could follow the lead of cross country skiing by having some events in one style and some in another e.g 500m as time trial, 1000m as heats/finals etc and long distance event as a mass start.
The 250m track solves the problem of people starting/finishing in/out in the 500 as they could start on opposite sides of the track as in a pursuit.