Very harsh imo.They wouldn't have played such a strong team in the cup if they had any inkling this would happen. Their tie vs QPR went to extra time too. I'd be raging if I was Parker/a Fulham fan.
It's really only 2 days notice if they had absolutely no inkling that something like that would happen given the fact that we fielded a bunch of 18 year olds on Friday, which would be incredibly naive on their part. Teams have apparently been warned ahead of the season that these things will happen.
Besides, they've already done at the very least the tactical preparation for Spurs given that their game was them was called off just hours before kick-off. Physically speaking, having to play on Wednesday after a Saturday is hardly out of step with the season so far, and that's without mentioning the fact that they rested most of their starters on Saturday anyway.
I have sympathy for them for sure, but this is about as common sense as it gets for the PL, and really the cleanest solution you could hope for from a Fulham perspective.