I always come back… No, that's not true at all.
I think I probably overuse that ambiguous phrase because it makes me think of an antique that has been repainted and has all this tacky shit glued to it, and you have no idea if the object underneath has any value until you strip all the other stuff off.
In this case, I'm talking about your description. It doesn't really matter whether this scip is human or just human blood, you have it walking around in human-shape (to the point of mimicking personnel). These are the qualities readers here tend to identify as "X-man": in other words, this reads like a superpower.
In its current, state, SCP-1665 is capable of complete locomotion and is capable of reshaping its volume into a wide variety of structural forms, including that of a human. It does not appear to be affected by gravity, and is able to traverse freely through the air, although it seldom exhibits this quality
SCP-1665 is able to mechanically manipulate type O human blood.
SCP-1665 displays considerable intelligence, often mimicking the actions of personnel it has had contact with, and employing its abilities in complicated ways to fascilitate needs that the Foundation is unable to provide.
You're not being rude, but I think you're just missing the point of the critique. There is no downside to this scip's state (the limitation to Type O is superfluous and doesn't add interest). There is no element of horror or intrigue or mystery. When I say strip it down, I mean scrap the super-powered elements completely. Scrap the entity-made-of-blood and its inexplicable smarts. As I said, the only thing you've got here that I think is worth keeping is the "SCP that effects different blood types in different ways".