I can't figure out a situation where getting Genjuro would be worth it.
Unless you already have an Assassin's Shroud, and that its late game and you already have all the other items you possibly could want...seems like a waste of an additional 3k gold.
That's like saying, any item over 6k, maybe even 5.5k gold isn't worth it. Sure, the HoN metagame has shifted towards 25-35 minute games (you might be able to finish Genjuro at 30-35 minutes), but hell, it's definitely worth it for some heroes the later the game gets.
You can literally, attack, hit for massive crit and slow the enemy; attack some more, then you have two options: A) Use Genjuro's second charge to attack and kill the guy or B) Use Genjuro's second charge to get out. While still easily countered in tryhard games, the stats, the slow, the charges, and the crit are sooooo good. Don't forget the movement speed too.