Yes the draw away to Huddersfield is hardly a plum tie for Dover. But, it is a chance to play at a much bigger ground (The McAlpine is smart) than they usually visit and there's some chance of at least taking it to a replay....them's the breaks. Far better it remains a random draw than it be seeded. The unpredictable nature of the draw plus the entry of the big boys into the fray is one of the highlights of the season (although ITV did their best to ruin it this year...). Those who govern football have already done as much as they can to extract unpredictability from football; to seed the draw would be to aid that unfortunate movement...
