Perhaps, though I don't recall hearing about this. It has been 1,000 feet vertically and 3 miles horizontally in terminal airspace as far as I can remember, though that's only roughly two years since I became a pilot. But those separation standards refer to aircraft already in the air. On the ground, separation is fairly clear. You can't have two aircraft using the runway at the same time. The only separation standard having to do with incursions would be the amount of separation needed to clear a following aircraft to land, but this isn't what's really at issue.

They've actually implemented procedures to tighten up ground movements. It is now required for ground controllers to give you exact routing instructions to your final destination. Previously, a controller could say "taxi to runway one-five" and you got to pick how you got there and it was an implied clearance to cross any runways between you and the destination. If needed, the controller previously could add restrictions. Now they have to give you the full route.

This is actually the first time recently that it looks like the controllers messed up. Previous incidents I can recall all had to do with pilots not following clearances and entering runways when they shouldn't. Here the tower cleared two aircraft to use intersecting runways at the same time.