Instead, why don't you ask the ground controller why he put the Dash there, knowing full well it would take them a while to get away due to the departing traffic at the time, having well known you guys would be coming up on Bravo.
Not quite as simple as that. The dash may have been put there for various reasons - to give the Tower a prop as No1 at a holding point, so it can be used right behind a jet in a 'half' gap or when it's flatout (once in a while) you simply look out the window and pick the first available hole.
The other thing of note, is that over the last 12 months or so we have had an influx of new staff and the skill level is not what it was - lots of good operators, but lacking experience in such a busy position.
Cheers keepemsperated.