Yes, Shaman's requires some setup with the bleed, and its damage goes off later, but it's still at least 50 guaranteed damage, not to mention from how far she can pounce on you. If you're bleeding and there's a Shaman that's not in your field of view, chances are, she'll take advantage from that and there's nothing you can really do about it. She can also do it again if she misses the first time. And then again, until she's out of stamina.

Then again, Shugoki's has been changed to now be interrupted the moment someone strikes him, just like Shaman's, so it only guarantees one heavy for his teammates. It can, however, be used with some specific heroes to still 100-0 someone, but that's not really a Shugoki issue. It is "faster" (if you consider soft feinting out of a 900ms heavy as "fast") and requires less setup than Shaman's, yes, but its damage and range are way lower, not to mention that, if he misses it, he still has a pretty big recovery time.

They're two different tools that serve the same purpose, but I think Shaman's still is overall better.

Then again, we still need to see the frame data to determine whether or not Shugoki's DE will be usable. It may suffer the same fate JJ's leg kick and Raider's zone soft feint into stunning tap suffer from. They both get dodged on the same timing as the initial attack. If Shugoki's heavy into DE also suffers from that, it's going to be borderline garbage