Whether or not it's a transitional phase, it seems reasonable to want and to build better tools for where we are now rather than where we may be in some unspecified future, wouldn't you say?

We think that humans will remain in charge for quite some time. Even a superintelligence won't know what we want until we tell it. The process of communicating intent/desires etc to an AI agent is a nontrivial interface problem (which Marble is trying to get at).

Agents frequently go off on tangents, make wrong decisions, require feedback etc. Agents have never moved away from being a junior that knows everything about programming but has no idea how to properly apply it.

If the human isn't ultimately in charge, don't be surprised when AI decides to eliminate humanity "for the greater good" or something.

Transition to what?